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Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011
Activity in the allowance for loan losses |  |  |  |  |
Balance at beginning of period | $ 18,313 | $ 22,142 | $ 19,241 | $ 22,336 |
Provision for loan losses | 3,199 | 1,066 | 5,659 | 2,430 |
Recoveries of loans previously charged off | 569 | 473 | 1,157 | 1,107 |
Loans charged off | (1,989) | (2,056) | (5,966) | (4,248) |
Balance at end of period | 20,092 | 21,625 | 20,092 | 21,625 |
Increase in provision for decrease in FDIC indemnification asset | (1,410) | 286 | (914) | 104 |
Ending Balance Attributable to Loans |  |  |  |  |
Individually evaluated for impairment | 4,429 |  | 4,429 |  | 3,261
Collectively evaluated for impairment | 15,415 |  | 15,415 |  | 14,841
Acquired with deteriorated credit quality | 248 |  | 248 |  | 1,139
Balance at end of period | 20,092 | 21,625 | 20,092 | 21,625 |
Loans |  |  |  |  |
Individually evaluated for impairment | 22,895 |  | 22,895 |  | 27,606
Collectively evaluated for impairment | 1,839,361 |  | 1,839,361 |  | 1,820,292
Acquired with deteriorated credit quality | 25,145 |  | 25,145 |  | 56,386
Ending Balance | 1,887,401 |  | 1,887,401 |  | 1,904,283
Commercial |  |  |  |  |
Activity in the allowance for loan losses |  |  |  |  |
Balance at beginning of period | 11,448 | 12,536 | 12,119 | 12,809 |
Provision for loan losses | 1,880 | 1,320 | 2,877 | 2,009 |
Recoveries of loans previously charged off | 206 | 336 | 396 | 435 |
Loans charged off | (344) | (1,306) | (2,202) | (2,367) |
Balance at end of period | 13,190 | 12,886 | 13,190 | 12,886 |
Ending Balance Attributable to Loans |  |  |  |  |
Individually evaluated for impairment | 4,239 |  | 4,239 |  | 3,071
Collectively evaluated for impairment | 8,709 |  | 8,709 |  | 8,264
Acquired with deteriorated credit quality | 242 |  | 242 |  | 784
Balance at end of period | 13,190 | 12,886 | 13,190 | 12,886 |
Loans |  |  |  |  |
Individually evaluated for impairment | 21,682 |  | 21,682 |  | 25,393
Collectively evaluated for impairment | 1,065,891 |  | 1,065,891 |  | 1,036,963
Acquired with deteriorated credit quality | 19,695 |  | 19,695 |  | 43,389
Ending Balance | 1,107,268 |  | 1,107,268 |  | 1,105,745
Residential |  |  |  |  |
Activity in the allowance for loan losses |  |  |  |  |
Balance at beginning of period | 2,092 | 3,251 | 2,728 | 2,873 |
Provision for loan losses | 582 | 607 | 1,265 | 1,294 |
Recoveries of loans previously charged off | 22 | 33 | 39 | 87 |
Loans charged off | (572) | (327) | (1,908) | (690) |
Balance at end of period | 2,124 | 3,564 | 2,124 | 3,564 |
Ending Balance Attributable to Loans |  |  |  |  |
Individually evaluated for impairment | 190 |  | 190 |  | 190
Collectively evaluated for impairment | 1,928 |  | 1,928 |  | 2,183
Acquired with deteriorated credit quality | 6 |  | 6 |  | 355
Balance at end of period | 2,124 | 3,564 | 2,124 | 3,564 |
Loans |  |  |  |  |
Individually evaluated for impairment | 1,213 |  | 1,213 |  | 2,213
Collectively evaluated for impairment | 495,404 |  | 495,404 |  | 492,139
Acquired with deteriorated credit quality | 5,442 |  | 5,442 |  | 12,986
Ending Balance | 502,059 |  | 502,059 |  | 507,338
Consumer |  |  |  |  |
Activity in the allowance for loan losses |  |  |  |  |
Balance at beginning of period | 3,806 | 4,054 | 3,889 | 4,551 |
Provision for loan losses | 670 | 243 | 989 | 33 |
Recoveries of loans previously charged off | 341 | 104 | 722 | 585 |
Loans charged off | (1,073) | (423) | (1,856) | (1,191) |
Balance at end of period | 3,744 | 3,978 | 3,744 | 3,978 |
Ending Balance Attributable to Loans |  |  |  |  |
Collectively evaluated for impairment | 3,744 |  | 3,744 |  | 3,889
Balance at end of period | 3,744 | 3,978 | 3,744 | 3,978 |
Loans |  |  |  |  |
Collectively evaluated for impairment | 278,066 |  | 278,066 |  | 291,190
Acquired with deteriorated credit quality | 8 |  | 8 |  | 11
Ending Balance | 278,074 |  | 278,074 |  | 291,201
Unallocated |  |  |  |  |
Activity in the allowance for loan losses |  |  |  |  |
Balance at beginning of period | 967 | 2,301 | 506 | 2,103 |
Provision for loan losses | 67 | (1,104) | 528 | (906) |
Balance at end of period | 1,034 | 1,197 | 1,034 | 1,197 |
Ending Balance Attributable to Loans |  |  |  |  |
Collectively evaluated for impairment | 1,034 |  | 1,034 |  | 505
Balance at end of period | $ 1,034 | $ 1,197 | $ 1,034 | $ 1,197 |

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