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Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Internal loan grading by class of loans |  |
Total loans | $ 3,242,427 | $ 3,013,498
Grade 1 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 2,791,300 | 2,606,271
Grade 2 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 375,584 | 319,558
Grade 3 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 56,130 | 67,150
Grade 4 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 19,413 | 20,519
Grade 5 [Member] |  |
Internal loan grading by class of loans |  |
Total loans |  |
Non-residential real estate [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 1,222,245 | 1,051,198
Non-residential real estate [Member] | Grade 1 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 1,020,247 | 907,687
Non-residential real estate [Member] | Grade 2 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 165,232 | 104,614
Non-residential real estate [Member] | Grade 3 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 27,110 | 30,519
Non-residential real estate [Member] | Grade 4 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 9,656 | 8,378
Non-residential real estate [Member] | Grade 5 [Member] |  |
Internal loan grading by class of loans |  |
Total loans |  |
Residential real estate [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 754,933 | 694,623
Residential real estate [Member] | Grade 1 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 648,877 | 599,337
Residential real estate [Member] | Grade 2 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 86,564 | 74,480
Residential real estate [Member] | Grade 3 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 15,382 | 15,567
Residential real estate [Member] | Grade 4 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 4,110 | 5,239
Residential real estate [Member] | Grade 5 [Member] |  |
Internal loan grading by class of loans |  |
Total loans |  |
Non-consumer non-real estate [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 785,123 | 726,690
Non-consumer non-real estate [Member] | Grade 1 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 684,740 | 626,735
Non-consumer non-real estate [Member] | Grade 2 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 92,784 | 91,497
Non-consumer non-real estate [Member] | Grade 3 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 6,084 | 7,399
Non-consumer non-real estate [Member] | Grade 4 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 1,515 | 1,059
Non-consumer non-real estate [Member] | Grade 5 [Member] |  |
Internal loan grading by class of loans |  |
Total loans |  |
Consumer non-real estate [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 221,747 | 200,216
Consumer non-real estate [Member] | Grade 1 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 209,182 | 188,180
Consumer non-real estate [Member] | Grade 2 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 10,305 | 9,229
Consumer non-real estate [Member] | Grade 3 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 1,904 | 2,431
Consumer non-real estate [Member] | Grade 4 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 356 | 376
Consumer non-real estate [Member] | Grade 5 [Member] |  |
Internal loan grading by class of loans |  |
Total loans |  |
Other loans [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 149,897 | 159,043
Other loans [Member] | Grade 1 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 145,239 | 152,798
Other loans [Member] | Grade 2 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 2,575 | 2,546
Other loans [Member] | Grade 3 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 1,172 | 1,653
Other loans [Member] | Grade 4 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 911 | 2,046
Other loans [Member] | Grade 5 [Member] |  |
Internal loan grading by class of loans |  |
Total loans |  |
Acquired loans [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 108,482 | 181,728
Acquired loans [Member] | Grade 1 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 83,015 | 131,534
Acquired loans [Member] | Grade 2 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 18,124 | 37,192
Acquired loans [Member] | Grade 3 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 4,478 | 9,581
Acquired loans [Member] | Grade 4 [Member] |  |
Internal loan grading by class of loans |  |
Total loans | 2,865 | 3,421
Acquired loans [Member] | Grade 5 [Member] |  |
Internal loan grading by class of loans |  |
Total loans |  |

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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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