Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest Income
Residential loans	$ 35,595	$ 29,472	$ 102,149	$ 80,289
Commercial loans	6,453	11,191	28,834	34,784
Real estate securities	18,600	22,749	58,112	75,363
Other interest income	258	72	926	167
Total interest income	60,906	63,484	190,021	190,603
Interest Expense
Short-term debt	(5,405)	(7,627)	(17,439)	(21,378)
Asset-backed securities issued	(3,193)	(5,190)	(11,457)	(17,037)
Long-term debt	(12,999)	(11,058)	(39,095)	(32,429)
Total Interest Expense	(21,597)	(23,875)	(67,991)	(70,844)
Net Interest Income	39,309	39,609	122,030	119,759
Reversal of provision for loan losses	859	60	7,102	115
Net Interest Income after Provision	40,168	39,669	129,132	119,874
Non-interest Income (loss)
Mortgage banking activities, net	9,766	1,333	24,712	10,706
Mortgage servicing rights income (loss), net	3,770	3,549	12,834	(6,545)
Investment fair value changes, net	11,918	(14,169)	(18,686)	(17,105)
Other income	1,643	327	4,157	2,435
Realized gains, net	6,615	5,548	26,037	16,170
Total non-interest income (loss), net	33,712	(3,412)	49,054	5,661
Operating expenses	(20,355)	(24,497)	(70,962)	(74,778)
Net Income before Provision for Income Taxes	53,525	11,760	107,224	50,757
(Provision for) benefit from income taxes	(972)	7,404	(1,327)	10,272
Net Income	$ 52,553	$ 19,164	$ 105,897	$ 61,029
Basic earnings per common share (usd per share)	$ 0.67	$ 0.22	$ 1.34	$ 0.71
Diluted earnings per common share (usd per share)	0.58	0.22	1.23	0.69
Regular dividends declared per common share (usd per share)	$ 0.28	$ 0.28	$ 0.84	$ 0.84
Basic weighted average shares outstanding (shares)	76,680,183	83,787,533	76,827,026	83,696,461
Diluted weighted average shares outstanding (shares)	97,831,617	85,074,704	97,991,678	85,338,996