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Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value, Measurements, Nonrecurring $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Residential loans, at lower of cost or fair value	$ 1,076
REO	1,285
Guarantee obligations	928
Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Residential loans, at lower of cost or fair value	1,076
REO	1,285
Guarantee obligations	928
Residential Loans at Lower of Cost or Fair Value
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Gain (Loss) on assets measured at fair value on a non-recurring basis	(16)
REO
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Gain (Loss) on assets measured at fair value on a non-recurring basis	$ (252)

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- Definition

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]

+ References

No definition available.

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

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- Definition

Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12201-110248

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

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- Definition

Fair value portion of other assets.

+ References

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