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Loans (Details 5) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Fixed interest rates | $ 3,322,817 us-gaap_LoansReceivableWithFixedRatesOfInterest1 |  | $ 3,252,331 us-gaap_LoansReceivableWithFixedRatesOfInterest1 |
Floating interest rates | 3,363,427 us-gaap_LoansReceivableWithVariableRatesOfInterest1 |  | 2,895,967 us-gaap_LoansReceivableWithVariableRatesOfInterest1 |
Loans and Leases Receivable | $ 6,686,244 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | [1] | $ 6,148,298 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | [1]
[1] | Current ratings as of December 31, 2014 and 2013, respectively.

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- 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=28367877&loc=d3e4428-111522 + Details
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- Definition Amount of loan with fixed rate of interest. + 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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- Definition Amount of loan with variable or adjustable rate of interest. + 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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