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Other Assets and Liabilities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Location	Dec. 31, 2014 USD ($) Location
Other Assets and Other Liabilities [Line Items]
Real estate owned (REO)	$ 4,896	$ 4,391
Amount related to transfers into REO	9,000
REO liquidations	4,000
Negative market valuation adjustments	$ 4,000
Sequoia
Other Assets and Other Liabilities [Line Items]
Number of REO properties recorded on balance sheet | Location	23	22

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Other Assets and Other Liabilities [Line Items]

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The number of real estate properties owned as of the balance sheet date.

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Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5162-111524

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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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-Number 210
-Section 28
-Article 12

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-Publisher SEC
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-Number 210
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Amount of real estate investments acquired through foreclosure for entities with a substantial portion of business acquiring and holding investment real estate.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 360
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-URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024

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Amount of real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate.

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Amount of write-down or reserve recognized in the income statement on real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.

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