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	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Performing TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	$ 66,955	$ 50,392
New modifications	462	30,796
Payoffs and payments, net	(14,527)	(15,492)
TDRs returned to accrual status	699	1,259
TDRs placed on nonaccrual status	0	0
Ending balance	53,589	66,955
Nonperforming TDRs [Member]
Financing Receivable, Modifications [Line Items]
Beginning balance	25,119	31,309
New modifications	4,372	4,187
Charge-offs	(1,061)	(92)
Payoffs and payments, net	(7,446)	(9,026)
TDRs returned to accrual status	(699)	(1,259)
TDRs placed on nonaccrual status	0	0
Ending balance	$ 20,285	$ 25,119

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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- 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

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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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