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Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011 | Sep. 30, 2011
--- | --- | --- | ---
Internal loan grading by class of loans |  |  |
Total loans | $ 3,116,096 | $ 3,013,498 | $ 2,984,114
Grade 1 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 2,709,926 |  | 2,596,700
Grade 2 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 327,755 |  | 289,865
Grade 3 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 56,548 |  | 67,427
Grade 4 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 21,826 |  | 30,025
Grade 5 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 41 |  | 97
Non-residential real estate [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 1,149,570 |  | 1,029,549
Non-residential real estate [Member] | Grade 1 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 984,606 |  | 881,622
Non-residential real estate [Member] | Grade 2 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 127,768 |  | 107,228
Non-residential real estate [Member] | Grade 3 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 27,523 |  | 32,223
Non-residential real estate [Member] | Grade 4 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 9,673 |  | 8,476
Residential real estate [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 737,798 |  | 695,916
Residential real estate [Member] | Grade 1 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 636,564 |  | 602,621
Residential real estate [Member] | Grade 2 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 81,970 |  | 72,095
Residential real estate [Member] | Grade 3 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 14,667 |  | 14,805
Residential real estate [Member] | Grade 4 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 4,597 |  | 6,395
Non-consumer non-real estate [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 733,906 |  | 692,510
Non-consumer non-real estate [Member] | Grade 1 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 644,066 |  | 620,123
Non-consumer non-real estate [Member] | Grade 2 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 80,863 |  | 63,375
Non-consumer non-real estate [Member] | Grade 3 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 6,500 |  | 7,881
Non-consumer non-real estate [Member] | Grade 4 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 2,477 |  | 1,131
Consumer non-real estate [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 207,743 |  | 201,632
Consumer non-real estate [Member] | Grade 1 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 195,242 |  | 189,895
Consumer non-real estate [Member] | Grade 2 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 10,185 |  | 8,950
Consumer non-real estate [Member] | Grade 3 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 1,965 |  | 2,380
Consumer non-real estate [Member] | Grade 4 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 349 |  | 407
Consumer non-real estate [Member] | Grade 5 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 2 |  |
Other loans [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 150,482 |  | 158,543
Other loans [Member] | Grade 1 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 146,037 |  | 151,336
Other loans [Member] | Grade 2 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 2,726 |  | 2,608
Other loans [Member] | Grade 3 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 887 |  | 1,874
Other loans [Member] | Grade 4 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 832 |  | 2,725
Acquired loans [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 136,597 |  | 205,964
Acquired loans [Member] | Grade 1 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 103,411 |  | 151,103
Acquired loans [Member] | Grade 2 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 24,243 |  | 35,609
Acquired loans [Member] | Grade 3 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 5,006 |  | 8,264
Acquired loans [Member] | Grade 4 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | 3,898 |  | 10,891
Acquired loans [Member] | Grade 5 [Member] |  |  |
Internal loan grading by class of loans |  |  |
Total loans | $ 39 |  | $ 97

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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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