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Balance Sheet Offsetting - Financial Instruments Eligible for Offset Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
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Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial assets | $ 8,192 | $ 16,265
Gross Amount Offset, Derivatives, Financial assets | 0 | 0
Net Amount Recognized, Derivatives, Financial assets | 8,192 | 16,265
Gross Amount Recognized, Resell agreements, Financial assets | 4,898 | 7,898
Gross Amount Offset, Resell agreements, Financial assets | 0 | 0
Net Amount Recognized, Resell agreements, Financial assets | 4,898 | 7,898
Gross Amount Recognized, Financial assets | 13,090 | 24,163
Gross Amount Offset, Financial assets | 0 | 0
Net Amount Recognized, Financial assets | 13,090 | 24,163
Gross Amount Recognized, Derivatives, Financial liabilities | 51,601 | 42,603
Gross Amount Offset, Derivatives, Financial liabilities | 0 | 0
Net Amount Recognized, Derivatives, Financial liabilities | 51,601 | 42,603
Gross Amount Recognized, Repurchase agreements, Financial liabilities | 612,541 | 668,053
Gross Amount Offset, Repurchase agreements, Financial liabilities | 0 | 0
Net Amount Recognized, Repurchase agreements, Financial liabilities | 612,541 | 668,053
Gross Amount Recognized, Financial liabilities | 664,142 | 710,656
Gross Amount Offset, Financial liabilities | 0 | 0
Net Amount Recognized, Financial Liabilities | 664,142 | 710,656
Loan/lease interest rate swaps and caps [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial assets | 5,878 | 12,268
Gross Amount Offset, Derivatives, Financial assets | 0 | 0
Net Amount Recognized, Derivatives, Financial assets | 5,878 | 12,268
Commodity swaps and options [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial assets | 2,314 | 3,907
Gross Amount Offset, Derivatives, Financial assets | 0 | 0
Net Amount Recognized, Derivatives, Financial assets | 2,314 | 3,907
Gross Amount Recognized, Derivatives, Financial liabilities | 11,050 | 5,916
Gross Amount Offset, Derivatives, Financial liabilities | 0 | 0
Net Amount Recognized, Derivatives, Financial liabilities | 11,050 | 5,916
Foreign currency forward contracts [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial assets | 0 | 90
Gross Amount Offset, Derivatives, Financial assets | 0 | 0
Net Amount Recognized, Derivatives, Financial assets | 0 | 90
Gross Amount Recognized, Derivatives, Financial liabilities | 454 | 27
Gross Amount Offset, Derivatives, Financial liabilities | 0 | 0
Net Amount Recognized, Derivatives, Financial liabilities | 454 | 27
Loan/lease interest rate swaps [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Gross Amount Recognized, Derivatives, Financial liabilities | 40,097 | 36,660
Gross Amount Offset, Derivatives, Financial liabilities | 0 | 0
Net Amount Recognized, Derivatives, Financial liabilities | $ 40,097 | $ 36,660

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- Definition Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph m -Subparagraph 1 -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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