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Loans (Details 6) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Loans |  |  |  |  |
Loans | $ 6,148,298 | [1] | $ 5,715,556 | [1] |
Interest which would have been recorded if the loans had not been in a non-accrual status | 67 |  | 0 |  | 2,325
Interest income collected on non-accruing loans | 0 |  | 2,288 |  | 2,375
Nonperforming Financing Receivable [Member] |  |  |  |  |
Loans |  |  |  |  |
Loans | 3,125 |  | 0 |  | 32,000
Private Corporation [Member] |  |  |  |  |
Loans |  |  |  |  |
Loans | 2,375,178 | [1] | 2,202,613 | [1] |
Private Corporation [Member] | Nonperforming Financing Receivable [Member] |  |  |  |  |
Loans |  |  |  |  |
Loans | 3,125 |  | 0 |  | 32,000
Private Middle Market Companies [Member] |  |  |  |  |
Loans |  |  |  |  |
Loans | $ 574,107 | [1] | $ 681,912 | [1] |
[1] | Current ratings as of December 31, 2013 and 2012, respectively.

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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=28367877&loc=d3e4428-111522 + Details
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