v2.4.0.6
Individually Impaired Loans by Class of Loans (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance $ 37,680 $ 43,630 $ 37,680 $ 43,630 $ 38,326
Recorded Investment 34,503 39,173 34,503 39,173 35,261
Allowance for Loan Losses Allocated 6,254 7,762 6,254 7,762 7,443
Average Recorded Investment 35,515 34,682 36,647 29,851  
Interest Income Recognized 218 288 662 612  
Interest Received 211 221 601 513  
Commercial [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 1,118   1,118   917
Allowance for Loan Losses Allocated 317   317   224
Residential Real Estate [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 8,500   8,500   6,100
Allowance for Loan Losses Allocated 1,729   1,729   477
Nonresidential Real Estate [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 19,111   19,111   20,390
Allowance for Loan Losses Allocated 2,993   2,993   2,994
Construction [Member]
         
Financing Receivable, Impaired [Line Items]          
Recorded Investment 5,774   5,774   7,854
Allowance for Loan Losses Allocated 1,215   1,215   3,748
Impaired Financing Receivables with No Related Allowance [Member] | Commercial [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 30 349 30 349 350
Recorded Investment 30 310 30 310 310
Allowance for Loan Losses Allocated 0 0 0 0 0
Average Recorded Investment 170 371 263 351  
Interest Income Recognized 0 0 0 0  
Interest Received 0 0 0 0  
Impaired Financing Receivables with No Related Allowance [Member] | Residential Real Estate [Member] | Home Equity Line of Credit [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 50 0 50 0 50
Recorded Investment 50 0 50 0 50
Allowance for Loan Losses Allocated 0 0 0 0 0
Average Recorded Investment 50   50 0  
Interest Income Recognized 0   0 0  
Interest Received 0   0 0  
Impaired Financing Receivables with No Related Allowance [Member] | Residential Real Estate [Member] | Multi Family [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 379 0 379 0 538
Recorded Investment 48 0 48 0 538
Allowance for Loan Losses Allocated 0 0 0 0 0
Average Recorded Investment 24 0 273 17  
Interest Income Recognized 0 0 0 0  
Interest Received 0 0 0 0  
Impaired Financing Receivables with No Related Allowance [Member] | Residential Real Estate [Member] | Residential Real Estate Other Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 2,869 2,121 2,869 2,121 1,703
Recorded Investment 2,626 2,121 2,626 2,121 1,703
Allowance for Loan Losses Allocated 0 0 0 0 0
Average Recorded Investment 2,336 2,325 2,094 1,288  
Interest Income Recognized 0 0 0 0  
Interest Received 0 0 0 0  
Impaired Financing Receivables with No Related Allowance [Member] | Nonresidential Real Estate [Member] | Commercial Mortgage Loans, Owner Occupied [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 802 1,011 802 1,011 1,101
Recorded Investment 792 955 792 955 1,101
Allowance for Loan Losses Allocated 0 0 0 0 0
Average Recorded Investment 490 587 698 503  
Interest Income Recognized 0 0 0 0  
Interest Received 0 0 0 0  
Impaired Financing Receivables with No Related Allowance [Member] | Nonresidential Real Estate [Member] | Commercial Mortgage Loans, Non Owner Occupied [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 6,206 897 6,206 897 2,122
Recorded Investment 5,701 897 5,701 897 2,116
Allowance for Loan Losses Allocated 0 0 0 0 0
Average Recorded Investment 3,797 1,044 2,848 848  
Interest Income Recognized 0 0 0 0  
Interest Received 0 0 0 0  
Impaired Financing Receivables with No Related Allowance [Member] | Construction [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 809 2,036 809 2,036 356
Recorded Investment 509 889 509 889 319
Allowance for Loan Losses Allocated 0 0 0 0 0
Average Recorded Investment 432 909 256 559  
Interest Income Recognized 0 0 0 0  
Interest Received 0 0 0 0  
Impaired Financing Receivables with Related Allowance [Member] | Commercial [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,088 1,379 1,088 1,379 733
Recorded Investment 1,088 1,379 1,088 1,379 607
Allowance for Loan Losses Allocated 317 504 317 504 224
Average Recorded Investment 823 2,370 950 1,959  
Interest Income Recognized 4 10 7 17  
Interest Received 4 5 5 9  
Impaired Financing Receivables with Related Allowance [Member] | Residential Real Estate [Member] | Home Equity Line of Credit [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,488 0 1,488 0 0
Recorded Investment 1,488 0 1,488 0 0
Allowance for Loan Losses Allocated 1,341 0 1,341 0 0
Average Recorded Investment 813 0 339 0  
Interest Income Recognized 12 0 12 0  
Interest Received 12 0 12 0  
Impaired Financing Receivables with Related Allowance [Member] | Residential Real Estate [Member] | Multi Family [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 1,324 868 1,324 868 0
Recorded Investment 1,324 868 1,324 868 0
Allowance for Loan Losses Allocated 243 291 243 291 0
Average Recorded Investment 1,554 869 815 922  
Interest Income Recognized 11 14 22 42  
Interest Received 11 9 22 28  
Impaired Financing Receivables with Related Allowance [Member] | Residential Real Estate [Member] | Residential Real Estate Other Financing Receivable [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 3,109 2,869 3,109 2,869 3,859
Recorded Investment 2,964 2,850 2,964 2,850 3,809
Allowance for Loan Losses Allocated 145 433 145 433 477
Average Recorded Investment 3,309 2,755 3,557 2,441  
Interest Income Recognized 31 18 76 54  
Interest Received 24 17 64 51  
Impaired Financing Receivables with Related Allowance [Member] | Nonresidential Real Estate [Member] | Commercial Mortgage Loans, Owner Occupied [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 8,544 9,471 8,544 9,471 10,771
Recorded Investment 8,543 9,348 8,543 9,348 9,798
Allowance for Loan Losses Allocated 2,651 1,093 2,651 1,093 1,477
Average Recorded Investment 8,774 5,123 9,081 2,884  
Interest Income Recognized 81 80 239 81  
Interest Received 81 25 237 26  
Impaired Financing Receivables with Related Allowance [Member] | Nonresidential Real Estate [Member] | Commercial Mortgage Loans, Non Owner Occupied [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 4,595 13,667 4,595 13,667 8,476
Recorded Investment 4,074 11,830 4,074 11,830 7,375
Allowance for Loan Losses Allocated 342 2,185 342 2,185 1,517
Average Recorded Investment 6,449 9,870 7,406 10,044  
Interest Income Recognized 34 90 143 215  
Interest Received 34 90 106 210  
Impaired Financing Receivables with Related Allowance [Member] | Construction [Member]
         
Financing Receivable, Impaired [Line Items]          
Unpaid Principal Balance 6,387 8,962 6,387 8,962 8,267
Recorded Investment 5,266 7,726 5,266 7,726 7,535
Allowance for Loan Losses Allocated 1,215 3,256 1,215 3,256 3,748
Average Recorded Investment 6,494 8,459 8,017 8,035  
Interest Income Recognized 45 76 163 203  
Interest Received $ 45 $ 75 $ 155 $ 189