Consolidated Balance Sheets (USD $)	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 532,620,000	$ 442,054,000
Restricted cash and cash equivalents	1,057,503,000	653,338,000
Residential loans at amortized cost, net	1,443,707,000	1,490,321,000
Residential loans at fair value	10,184,477,000	6,710,211,000
Receivables at fair value	269,021,000	259,009,000
Servicer and protective advances, net	1,044,410,000	173,047,000
Servicing rights, net (includes $880,950 and $0 at fair value at June 30, 2013 and December 31, 2012, respectively)	1,074,783,000	242,712,000
Goodwill	654,565,000	580,378,000
Intangible assets, net	137,909,000	144,492,000
Premises and equipment, net	155,411,000	137,785,000
Other assets	375,806,000	144,830,000
Total assets	16,930,212,000	10,978,177,000
LIABILITIES AND STOCKHOLDERS' EQUITY
Payables and accrued liabilities	701,349,000	260,610,000
Servicer payables	959,565,000	587,929,000
Servicing advance liabilities	737,629,000	100,164,000
Debt	3,625,115,000	1,146,249,000
Mortgage-backed debt (includes $721,080 and $757,286 at fair value at June 30, 2013 and December 31, 2012, respectively)	1,980,868,000	2,072,728,000
HMBS related obligations at fair value	7,805,846,000	5,874,552,000
Deferred tax liability, net	45,813,000	41,017,000
Total liabilities	15,856,185,000	10,083,249,000
Commitments and contingencies (Note 22)
Stockholders' equity:
Preferred stock, $0.01 par value per share: Authorized - 10,000,000 shares; Issued and outstanding - 0 shares at June 30, 2013 and December 31, 2012
Common stock, $0.01 par value per share: Authorized - 90,000,000 shares; Issued and outstanding - 36,956,904 and 36,687,785 shares at June 30, 2013 and December 31, 2012, respectively	370,000	367,000
Additional paid-in capital	570,101,000	561,963,000
Retained earnings	503,086,000	332,105,000
Accumulated other comprehensive income	470,000	493,000
Total stockholders' equity	1,074,027,000	894,928,000
Total liabilities and stockholders' equity	16,930,212,000	10,978,177,000
VIE [Member]
Assets
Restricted cash and cash equivalents	57,278,000	58,253,000
Residential loans at amortized cost, net	1,427,715,000	1,475,782,000
Residential loans at fair value	613,627,000	646,498,000
Receivables at fair value	50,890,000	53,975,000
Servicer and protective advances, net	78,309,000	77,082,000
Other assets	58,274,000	62,683,000
Total assets	2,286,093,000	2,374,273,000
LIABILITIES AND STOCKHOLDERS' EQUITY
Payables and accrued liabilities	8,753,000	9,007,000
Servicing advance liabilities	65,505,000	64,552,000
Mortgage-backed debt (includes $721,080 and $757,286 at fair value at June 30, 2013 and December 31, 2012, respectively)	1,980,868,000	2,072,728,000
Total liabilities	$ 2,055,126,000	$ 2,146,287,000