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Activity in Allowance for Losses for Non-Covered Loans and Covered Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment		$ 577
Allowance for Loan Losses, Collectively evaluated for impairment	$ 152,817	155,947
Allowance for Loan Losses	154,683	181,991
Acquired loans with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, other	1,866	25,467
Mortgage Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Collectively evaluated for impairment	120,325	123,925
Allowance for Loan Losses	121,721	135,909
Mortgage Receivable | Acquired loans with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, other	1,396	11,984
Other loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually evaluated for impairment		577
Allowance for Loan Losses, Collectively evaluated for impairment	32,492	32,022
Allowance for Loan Losses	32,962	46,082
Other loans | Acquired loans with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, other	$ 470	$ 13,483

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- Definition

Financing Receivable, Allowance For Credit Losses, Allocated

+ References

No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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