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Carrying Values and Estimated Fair Values of Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Assets
Trading securities	$ 108,750		$ 124,555
Available-for-sale securities	1,286,235		1,558,306
MSRs	135,152		64,824
Derivative assets	7,756		7,787
Liabilities
Derivative liabilities	38,263		18,167
Long/Other Long-term debt	66,146		0
Carrying Value
Assets
Trading securities	108,750		124,555
Available-for-sale securities	1,286,235		1,558,306
MSRs	135,152		64,824
Cash and cash equivalents	149,617		173,201
Restricted cash	455		398
Accrued interest receivable	15,261		13,475
Derivative assets	7,756		7,787
REO	3,349	[1]	3,661	[1]
Margin receivable	56,217	[1]	31,149	[1]
Other collateral posted	5,000	[1]	5,000	[1]
Liabilities
Short-term debt	1,887,688		862,763
Accrued interest payable	10,480		6,366
Derivative liabilities	38,263		18,167
ABS issued	1,656,202		1,942,962
FHLBC Borrowings	203,756
Commercial long-term debt			49,467
Convertible notes	287,500		287,500
Long/Other Long-term debt	139,500		139,500
Carrying Value | Residential Loans at Fair Value
Assets
Loans, held-for-sale	1,501,252		402,602
Carrying Value | Residential Loans at Lower of Cost or Fair Value
Assets
Loans, held-for-sale	1,502		1,665
Carrying Value | Residential Loans Held For Investment at Fair Value
Assets
Loans, held-for-investment	238,326
Carrying Value | Residential Loans Held for Investment
Assets
Loans, held-for-investment	1,546,507		1,762,167
Carrying Value | Commercial Loans at Fair Value
Assets
Loans, held-for-sale	175,421		89,111
Carrying Value | Commercial Loans Held For Investment
Assets
Loans, held-for-investment	70,712
Carrying Value | Commercial Loans Held-for-Investment, at Amortized Cost
Assets
Loans, held-for-investment	322,576		343,344
Carrying Value | Commercial Secured Borrowings
Liabilities
Long/Other Long-term debt	66,146
Fair Value
Assets
Trading securities	108,750		124,555
Available-for-sale securities	1,286,235		1,558,306
MSRs	135,152		64,824
Cash and cash equivalents	149,617		173,201
Restricted cash	455		398
Accrued interest receivable	15,261		13,475
Derivative assets	7,756		7,787
REO	3,407	[1]	4,084	[1]
Margin receivable	56,217	[1]	31,149	[1]
Other collateral posted	5,000	[1]	5,000	[1]
Liabilities
Short-term debt	1,887,688		862,763
Accrued interest payable	10,480		6,366
Derivative liabilities	38,263		18,167
ABS issued	1,548,795		1,746,906
FHLBC Borrowings	203,756
Commercial long-term debt			49,467
Convertible notes	285,344		299,719
Long/Other Long-term debt	101,835		111,600
Fair Value | Residential Loans at Fair Value
Assets
Loans, held-for-sale	1,501,252		402,602
Fair Value | Residential Loans at Lower of Cost or Fair Value
Assets
Loans, held-for-sale	1,662		1,817
Fair Value | Residential Loans Held For Investment at Fair Value
Assets
Loans, held-for-investment	238,326
Fair Value | Residential Loans Held for Investment
Assets
Loans, held-for-investment	1,447,463		1,610,024
Fair Value | Commercial Loans at Fair Value
Assets
Loans, held-for-sale	175,421		89,111
Fair Value | Commercial Loans Held For Investment
Assets
Loans, held-for-investment	70,712
Fair Value | Commercial Loans Held-for-Investment, at Amortized Cost
Assets
Loans, held-for-investment	328,076		348,305
Fair Value | Commercial Secured Borrowings
Liabilities
Long/Other Long-term debt	$ 66,146
[1] These assets are included in Other Assets on our consolidated balance sheets.

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