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Loans (Details 6) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Loans |  |  |
Loans | $ 5,715,556 | $ 4,959,573 |
Interest which would have been recorded if the loans had not been in a non-accrual status | 0 | 2,325 | 3,403
Interest income collected on non-accruing loans | 2,288 | 2,375 | 3,335
Private Corporation [Member] |  |  |
Loans |  |  |
Loans | 2,202,613 | 2,089,520 |
Private Middle Market Companies [Member] |  |  |
Loans |  |  |
Loans | 681,912 | 445,731 |
Nonperforming Financing Receivable [Member] |  |  |
Loans |  |  |
Loans | 0 | 32,000 | 29,002
Nonperforming Financing Receivable [Member] | Private Corporation [Member] |  |  |
Loans |  |  |
Loans | 0 | 32,000 | 28,000
Nonperforming Financing Receivable [Member] | Private Middle Market Companies [Member] |  |  |
Loans |  |  |
Loans | $ 0 | $ 0 | $ 1,002

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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AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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