v2.4.0.6
Risk Category of Loans by Class of Loans (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]  
Gross loans$ 1,145,230$ 1,131,401
Commercial
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans181,932193,176
Residential real estate
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans280,135266,268
Residential real estate | Home Equity Line of Credit
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans101,58094,680
Residential real estate | Multi Family
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans43,35636,756
Residential real estate | Residential Real Estate Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans135,199134,832
Nonresidential real estate
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans539,748523,485
Nonresidential real estate | Commercial Mortgage Loans, Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans266,962252,768
Nonresidential real estate | Commercial Mortgage Loans, Non Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans272,786270,717
Construction
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans100,094104,788
Consumer
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans16,30716,618
Consumer | Consumer Credit Card Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans6,3276,492
Consumer | Consumer Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans9,98010,126
Municipal Obligations
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans27,01427,066
Pass
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans849,490831,152
Pass | Commercial
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans161,292170,394
Pass | Residential real estate | Home Equity Line of Credit
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans11,4720
Pass | Residential real estate | Multi Family
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans41,47136,115
Pass | Residential real estate | Residential Real Estate Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans40,10938,725
Pass | Nonresidential real estate | Commercial Mortgage Loans, Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans232,488221,941
Pass | Nonresidential real estate | Commercial Mortgage Loans, Non Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans249,678246,614
Pass | Construction
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans85,96690,297
Pass | Consumer | Consumer Credit Card Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Pass | Consumer | Consumer Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Pass | Municipal Obligations
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans27,01427,066
Special Mention
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans46,96931,910
Special Mention | Commercial
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans16,8479,684
Special Mention | Residential real estate | Home Equity Line of Credit
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans965712
Special Mention | Residential real estate | Multi Family
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans101103
Special Mention | Residential real estate | Residential Real Estate Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans1,1331,357
Special Mention | Nonresidential real estate | Commercial Mortgage Loans, Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans16,7137,754
Special Mention | Nonresidential real estate | Commercial Mortgage Loans, Non Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans7,8278,902
Special Mention | Construction
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans3,3833,398
Special Mention | Consumer | Consumer Credit Card Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Special Mention | Consumer | Consumer Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Special Mention | Municipal Obligations
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Substandard
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans61,23074,844
Substandard | Commercial
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans3,79313,098
Substandard | Residential real estate | Home Equity Line of Credit
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans1,006976
Substandard | Residential real estate | Multi Family
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans1,784538
Substandard | Residential real estate | Residential Real Estate Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans10,84410,843
Substandard | Nonresidential real estate | Commercial Mortgage Loans, Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans17,76123,073
Substandard | Nonresidential real estate | Commercial Mortgage Loans, Non Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans15,28115,201
Substandard | Construction
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans10,74511,093
Substandard | Consumer | Consumer Credit Card Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Substandard | Consumer | Consumer Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans1622
Substandard | Municipal Obligations
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Doubtful
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans12384
Doubtful | Commercial
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Doubtful | Residential real estate | Home Equity Line of Credit
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans9084
Doubtful | Residential real estate | Multi Family
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Doubtful | Residential real estate | Residential Real Estate Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans310
Doubtful | Nonresidential real estate | Commercial Mortgage Loans, Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Doubtful | Nonresidential real estate | Commercial Mortgage Loans, Non Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Doubtful | Construction
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Doubtful | Consumer | Consumer Credit Card Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans20
Doubtful | Consumer | Consumer Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Doubtful | Municipal Obligations
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans00
Not Rated
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans187,418[1]193,411[1]
Not Rated | Commercial
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans0[1]0[1]
Not Rated | Residential real estate | Home Equity Line of Credit
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans88,047[1]92,908[1]
Not Rated | Residential real estate | Multi Family
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans0[1]0[1]
Not Rated | Residential real estate | Residential Real Estate Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans83,082[1]83,907[1]
Not Rated | Nonresidential real estate | Commercial Mortgage Loans, Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans0[1]0[1]
Not Rated | Nonresidential real estate | Commercial Mortgage Loans, Non Owner Occupied
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans0[1]0[1]
Not Rated | Construction
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans0[1]0[1]
Not Rated | Consumer | Consumer Credit Card Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans6,325[1]6,492[1]
Not Rated | Consumer | Consumer Other Financing Receivable
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans9,964[1]10,104[1]
Not Rated | Municipal Obligations
  
Financing Receivable, Recorded Investment [Line Items]  
Gross loans$ 0[1]$ 0[1]
[1]Not rated loans represent the homogenous pools risk category.