Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Interest income	$ 397,722	$ 282,388	$ 1,162,212	$ 749,901
Interest expense	125,278	96,488	338,664	278,401
Net interest income (expense)	272,444	185,900	823,548	471,500
Impairment
Other-than-temporary impairment (OTTI) on securities	1,509	1,765	8,736	7,838
Valuation and loss provision on loans and real estate owned	26,700	18,275	65,381	41,845
Total Impairment Charges	28,209	20,040	74,117	49,683
Net interest income after impairment	244,235	165,860	749,431	421,817
Servicing revenue, net	58,014	0	269,467	0
Other Income
Change in fair value of investments in excess mortgage servicing rights	(14,291)	(17,060)	(32,650)	(24,397)
Change in fair value of investments in excess mortgage servicing rights, equity method investees	2,054	6,261	6,056	8,608
Change in fair value of investments in mortgage servicing rights financing receivable	70,232	0	75,828	0
Change in fair value of servicer advance investments	10,941	21,606	70,469	4,328
Gain on consumer loans investment	0	0	0	9,943
Gain on remeasurement of consumer loans investment	0	0	0	71,250
Gain (loss) on settlement of investments, net	1,553	(11,165)	1,250	(37,682)
Earnings from investments in consumer loans, equity method investees	6,769	0	12,649	0
Other income (loss), net	9,887	27,059	7,696	6,850
Other Income	87,145	26,701	141,298	38,900
Operating Expenses
General and administrative expenses	19,919	8,777	47,788	28,082
Management fee to affiliate	14,187	10,536	41,447	30,552
Incentive compensation to affiliate	19,491	7,075	72,123	13,200
Loan servicing expense	13,690	14,187	40,068	30,037
Subservicing expense	49,773	0	123,435	0
Total Operating Expenses	117,060	40,575	324,861	101,871
Income (Loss) Before Income Taxes	272,334	151,986	835,335	358,846
Income tax expense (benefit)	32,613	20,900	121,053	18,195
Net Income (Loss)	239,721	131,086	714,282	340,651
Noncontrolling interests in Income of Consolidated Subsidiaries	13,600	32,178	45,051	61,355
Net income (loss) attributable to common stockholders	$ 226,121	$ 98,908	$ 669,231	$ 279,296
Net Income Per Share of Common Stock
Basic (in dollars per share)	$ 0.74	$ 0.41	$ 2.23	$ 1.19
Diluted (in dollars per share)	$ 0.73	$ 0.41	$ 2.21	$ 1.19
Weighted Average Number of Shares of Common Stock Outstanding
Basic (in shares)	307,361,309	240,601,691	300,511,550	233,875,067
Diluted (in shares)	309,207,345	241,099,381	302,357,147	234,184,611
Dividend declared per Share of Common Stock (in dollars per share)	$ 0.5	$ 0.46	$ 1.48	$ 1.38