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Components of Mortgage Banking Activities, Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Mortgage Loans on Real Estate [Line Items]
Sequoia IO securities	$ (8,810)		$ 36,336		$ (13,087)		$ 38,265
Risk management derivatives	(8,673)		49,544		(15,755)		50,567
Mortgage banking activities, net	6,310		48,723		6,079		94,260
Mortgage Banking Activities
Mortgage Loans on Real Estate [Line Items]
Sequoia IO securities	(8,810)		36,336		(13,087)		38,265
Loan purchase and forward sale commitments	3,582				3,590
Net gains on commercial loan originations and sales			3,854				11,031
Mortgage banking activities, net	6,310		48,723		6,079		94,260
Mortgage Banking Activities | Residential Mortgage Banking Activities
Mortgage Loans on Real Estate [Line Items]
Loans, at fair value	13,375		(41,405)		20,403		(6,535)
Risk management derivatives	(7,858)	[1]	46,621	[1]	(12,136)	[1]	48,508	[1]
Other fees	1,040		738		1,495		1,276
Mortgage banking activities, net	1,329		42,290		265		81,514
Mortgage Banking Activities | Commercial Mortgage Banking Activities
Mortgage Loans on Real Estate [Line Items]
Loans, at fair value	5,714		(345)		9,340		(345)
Risk management derivatives	(815)	[1]	2,924	[1]	(3,619)	[1]	2,059	[1]
Other fees	82				93		1
Mortgage banking activities, net	$ 4,981		$ 6,433		$ 5,814		$ 12,746
[1] Represents market valuation changes of derivatives that are used to manage risks associated with our accumulation of residential and commercial loans.

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- Definition

Forward Purchase Commitment Fair Value Hedge Liability At Fair Value

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- Definition

Gain (Loss) on Sales of Commercial Loans and Originations, Net

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- Definition

The aggregate net change in market value for derivative instruments associated with mortgage banking activities.

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- Definition

The net income attributable to mortgage banking activities. This includes market valuations related to residential and commercial loans, Sequoia IOs, and mortgage banking derivatives, as well as realized gains or losses associated with mortgage loan sales.

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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)

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Fee and commission revenue earned from sources not otherwise specified in the existing taxonomy.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Amount of increase (decrease) in the fair value of equity or debt securities classified as trading.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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-Name Accounting Standards Codification

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