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Loans and Allowance for Loan Losses (Details 6) (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
Activity in ALLL by class of loans |  |  |  |  |
Beginning balance | $ 37,436 | $ 37,092 | $ 37,656 | $ 35,745 |
Charge-offs | (500) | (629) | (1,563) | (2,364) |
Recoveries | 89 | 108 | 511 | 389 |
Net charge-offs | (411) | (521) | (1,052) | (1,975) |
Provisions charged to operations | 233 | 885 | 654 | 3,686 |
Ending balance | 37,258 | 37,456 | 37,258 | 37,456 |
Individually evaluated for impairment | 6,928 | 8,110 | 6,928 | 8,110 |
Collectively evaluated for impairment | 30,330 | 29,346 | 30,330 | 29,346 |
Allowance for credit losses: Balance at end of period | 37,258 | 37,456 | 37,258 | 37,456 |
Individually evaluated for impairment | 68,015 | 73,956 | 68,015 | 73,956 |
Collectively evaluated for impairment | 3,039,138 | 2,890,906 | 3,039,138 | 2,890,906 |
Loans acquired with deteriorated credit quality | 8,943 | 19,252 | 8,943 | 19,252 |
Ending balance | 3,116,096 | 2,984,114 | 3,116,096 | 2,984,114 | 3,013,498
Non-residential real estate [Member] |  |  |  |  |
Activity in ALLL by class of loans |  |  |  |  |
Beginning balance | 14,349 | 13,651 | 13,948 | 13,142 |
Charge-offs | (30) | (67) | (158) | (336) |
Recoveries | 17 | 7 | 48 | 23 |
Net charge-offs | (13) | (60) | (110) | (313) |
Provisions charged to operations | (453) | 290 | 45 | 1,052 |
Ending balance | 13,883 | 13,881 | 13,883 | 13,881 |
Individually evaluated for impairment | 2,396 | 3,351 | 2,396 | 3,351 |
Collectively evaluated for impairment | 11,487 | 10,530 | 11,487 | 10,530 |
Allowance for credit losses: Balance at end of period | 13,883 | 13,881 | 13,883 | 13,881 |
Individually evaluated for impairment | 37,195 | 40,700 | 37,195 | 40,700 |
Collectively evaluated for impairment | 1,112,375 | 988,849 | 1,112,375 | 988,849 |
Ending balance | 1,149,570 | 1,029,549 | 1,149,570 | 1,029,549 |
Residential real estate [Member] |  |  |  |  |
Activity in ALLL by class of loans |  |  |  |  |
Beginning balance | 10,006 | 9,380 | 9,764 | 8,957 |
Charge-offs | (157) | (21) | (288) | (522) |
Recoveries | 9 | 20 | 118 | 115 |
Net charge-offs | (148) | (1) | (170) | (407) |
Provisions charged to operations | (137) | 472 | 127 | 1,301 |
Ending balance | 9,721 | 9,851 | 9,721 | 9,851 |
Individually evaluated for impairment | 2,305 | 2,681 | 2,305 | 2,681 |
Collectively evaluated for impairment | 7,416 | 7,170 | 7,416 | 7,170 |
Allowance for credit losses: Balance at end of period | 9,721 | 9,851 | 9,721 | 9,851 |
Individually evaluated for impairment | 19,264 | 21,200 | 19,264 | 21,200 |
Collectively evaluated for impairment | 718,534 | 674,716 | 718,534 | 674,716 |
Ending balance | 737,798 | 695,916 | 737,798 | 695,916 |
Non-consumer non-real estate [Member] |  |  |  |  |
Activity in ALLL by class of loans |  |  |  |  |
Beginning balance | 8,558 | 9,334 | 9,156 | 9,587 |
Charge-offs | (119) | (210) | (449) | (394) |
Recoveries | 19 | 46 | 144 | 130 |
Net charge-offs | (100) | (164) | (305) | (264) |
Provisions charged to operations | 712 | (460) | 319 | (613) |
Ending balance | 9,170 | 8,710 | 9,170 | 8,710 |
Individually evaluated for impairment | 1,692 | 1,528 | 1,692 | 1,528 |
Collectively evaluated for impairment | 7,478 | 7,182 | 7,478 | 7,182 |
Allowance for credit losses: Balance at end of period | 9,170 | 8,710 | 9,170 | 8,710 |
Individually evaluated for impairment | 8,976 | 9,012 | 8,976 | 9,012 |
Collectively evaluated for impairment | 724,930 | 683,498 | 724,930 | 683,498 |
Ending balance | 733,906 | 692,510 | 733,906 | 692,510 |
Consumer non-real estate [Member] |  |  |  |  |
Activity in ALLL by class of loans |  |  |  |  |
Beginning balance | 2,282 | 2,237 | 2,315 | 2,301 |
Charge-offs | (117) | (72) | (308) | (400) |
Recoveries | 42 | 24 | 157 | 92 |
Net charge-offs | (75) | (48) | (151) | (308) |
Provisions charged to operations | 162 | 136 | 205 | 332 |
Ending balance | 2,369 | 2,325 | 2,369 | 2,325 |
Individually evaluated for impairment | 315 | 318 | 315 | 318 |
Collectively evaluated for impairment | 2,054 | 2,007 | 2,054 | 2,007 |
Allowance for credit losses: Balance at end of period | 2,369 | 2,325 | 2,369 | 2,325 |
Individually evaluated for impairment | 2,316 | 2,787 | 2,316 | 2,787 |
Collectively evaluated for impairment | 205,427 | 198,845 | 205,427 | 198,845 |
Ending balance | 207,743 | 201,632 | 207,743 | 201,632 |
Other loans [Member] |  |  |  |  |
Activity in ALLL by class of loans |  |  |  |  |
Beginning balance | 1,854 | 1,712 | 1,886 | 1,758 |
Charge-offs | (24) | (121) | (231) | (243) |
Recoveries | 2 | 2 | 33 | 9 |
Net charge-offs | (22) | (119) | (198) | (234) |
Provisions charged to operations | 6 | 156 | 150 | 225 |
Ending balance | 1,838 | 1,749 | 1,838 | 1,749 |
Individually evaluated for impairment | 220 | 232 | 220 | 232 |
Collectively evaluated for impairment | 1,618 | 1,517 | 1,618 | 1,517 |
Allowance for credit losses: Balance at end of period | 1,838 | 1,749 | 1,838 | 1,749 |
Individually evaluated for impairment | 264 | 257 | 264 | 257 |
Collectively evaluated for impairment | 150,218 | 158,286 | 150,218 | 158,286 |
Ending balance | 150,482 | 158,543 | 150,482 | 158,543 |
Acquired loans [Member] |  |  |  |  |
Activity in ALLL by class of loans |  |  |  |  |
Beginning balance | 387 | 778 | 587 |  |
Charge-offs | (53) | (138) | (129) | (469) |
Recoveries |  | 9 | 11 | 20 |
Net charge-offs | (53) | (129) | (118) | (449) |
Provisions charged to operations | (57) | 291 | (192) | 1,389 |
Ending balance | 277 | 940 | 277 | 940 |
Collectively evaluated for impairment | 277 | 940 | 277 | 940 |
Allowance for credit losses: Balance at end of period | 277 | 940 | 277 | 940 |
Collectively evaluated for impairment | 127,654 | 186,712 | 127,654 | 186,712 |
Loans acquired with deteriorated credit quality | 8,943 | 19,252 | 8,943 | 19,252 |
Ending balance | $ 136,597 | $ 205,964 | $ 136,597 | $ 205,964 |

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- Definition Reflects the net amount of other additions and reductions in the reserve for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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