Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Activity Related to Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Performing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	$ 53,589	$ 66,955
New modifications	0	41
Payoffs and payments, net	(8,729)	(602)
TDRs returned to accrual status	516	0
TDRs placed on nonaccrual status	0	0
Ending balance	45,376	66,394
Nonperforming TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	20,285	25,119
New modifications	0	0
Charge-offs	0	0
Payoffs and payments, net	(2,995)	(1,151)
TDRs returned to accrual status	(516)	0
TDRs placed on nonaccrual status	0	0
Ending balance	$ 16,774	$ 23,968

The increase in performing troubled debt restructurings financing receivables, because of returns to accrual status.

No definition available.

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- Definition

The decrease in performing troubled debt restructurings financing receivables, because of the change in accrual status to nonaccrual.

+ References

No definition available.

+ Details

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- Definition

Financing Receivables Impaired Troubled Debt Restructuring Additions

+ References

No definition available.

+ Details

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- Definition

Financing Receivables Impaired Troubled Debt Restructuring Payments

+ References

No definition available.

+ Details

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- Details

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- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

+ Details

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- Details

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- Details

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