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Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Activity in ALLL by class of loans |  |
Beginning balance | $ 37,656 | $ 35,745
Charge-offs | (2,644) | (3,097)
Recoveries | 613 | 493
Net charge-offs | (2,031) | (2,604)
Provisions charged to operations | 3,100 | 4,515
Individually evaluated for impairment | 7,005 | 7,958
Collectively evaluated for impairment | 31,720 | 29,698
Individually evaluated for impairment | 66,351 | 71,229
Collectively evaluated for impairment | 3,168,733 | 2,929,267
Loans acquired with deteriorated credit quality | 7,343 | 13,002
Ending balance | 38,725 | 37,656
Ending balance | 3,242,427 | 3,013,498
Non-residential real estate [Member] |  |
Activity in ALLL by class of loans |  |
Beginning balance | 13,948 | 13,142
Charge-offs | (291) | (353)
Recoveries | 56 | 23
Net charge-offs | (235) | (330)
Provisions charged to operations | 1,256 | 1,136
Individually evaluated for impairment | 2,759 | 3,295
Collectively evaluated for impairment | 12,210 | 10,653
Individually evaluated for impairment | 36,765 | 38,897
Collectively evaluated for impairment | 1,185,480 | 1,012,301
Ending balance | 14,969 | 13,948
Ending balance | 1,222,245 | 1,051,198
Residential real estate [Member] |  |
Activity in ALLL by class of loans |  |
Beginning balance | 9,764 | 8,957
Charge-offs | (616) | (752)
Recoveries | 134 | 141
Net charge-offs | (482) | (611)
Provisions charged to operations | 533 | 1,418
Individually evaluated for impairment | 2,303 | 2,636
Collectively evaluated for impairment | 7,512 | 7,128
Individually evaluated for impairment | 19,492 | 20,806
Collectively evaluated for impairment | 735,441 | 673,817
Ending balance | 9,815 | 9,764
Ending balance | 754,933 | 694,623
Non-consumer non-real estate [Member] |  |
Activity in ALLL by class of loans |  |
Beginning balance | 9,156 | 9,587
Charge-offs | (590) | (524)
Recoveries | 171 | 156
Net charge-offs | (419) | (368)
Provisions charged to operations | 648 | (63)
Individually evaluated for impairment | 1,403 | 1,445
Collectively evaluated for impairment | 7,982 | 7,711
Individually evaluated for impairment | 7,599 | 8,458
Collectively evaluated for impairment | 777,524 | 718,232
Ending balance | 9,385 | 9,156
Ending balance | 785,123 | 726,690
Consumer non-real estate [Member] |  |
Activity in ALLL by class of loans |  |
Beginning balance | 2,315 | 2,301
Charge-offs | (509) | (652)
Recoveries | 194 | 120
Net charge-offs | (315) | (532)
Provisions charged to operations | 451 | 546
Individually evaluated for impairment | 287 | 328
Collectively evaluated for impairment | 2,164 | 1,987
Individually evaluated for impairment | 2,260 | 2,807
Collectively evaluated for impairment | 219,487 | 197,409
Ending balance | 2,451 | 2,315
Ending balance | 221,747 | 200,216
Other loans [Member] |  |
Activity in ALLL by class of loans |  |
Beginning balance | 1,886 | 1,758
Charge-offs | (265) | (270)
Recoveries | 34 | 28
Net charge-offs | (231) | (242)
Provisions charged to operations | 230 | 370
Individually evaluated for impairment | 253 | 254
Collectively evaluated for impairment | 1,632 | 1,632
Individually evaluated for impairment | 235 | 261
Collectively evaluated for impairment | 149,662 | 158,782
Ending balance | 1,885 | 1,886
Ending balance | 149,897 | 159,043
Acquired loans [Member] |  |
Activity in ALLL by class of loans |  |
Beginning balance | 587 |
Charge-offs | (373) | (546)
Recoveries | 24 | 25
Net charge-offs | (349) | (521)
Provisions charged to operations | (18) | 1,108
Collectively evaluated for impairment | 220 | 587
Collectively evaluated for impairment | 101,139 | 168,726
Loans acquired with deteriorated credit quality | 7,343 | 13,002
Ending balance | 220 | 587
Ending balance | $ 108,482 | $ 181,728

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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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- Definition The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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