CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest income:
Residential mortgage investments	$ 56,103	$ 53,309	$ 110,944	$ 112,809
Other	238	128	391	320
Interest income	56,341	53,437	111,335	113,129
Interest expense:
Secured borrowings	(33,850)	(27,014)	(62,090)	(53,596)
Unsecured borrowings	(1,900)	(1,976)	(3,791)	(3,953)
Interest expense	(35,750)	(28,990)	(65,881)	(57,549)
Net interest income (expense)	20,591	24,447	45,454	55,580
Other revenue (expense):
Compensation-related expense	(1,833)	(2,042)	(2,948)	(5,266)
Other general and administrative expense	(1,276)	(1,157)	(2,338)	(2,326)
Miscellaneous other revenue	67	382	82	995
Operating expenses	(3,042)	(2,817)	(5,204)	(6,597)
Net income	17,549	21,630	40,250	48,983
Net income available to common stockholders:
Net income	17,549	21,630	40,250	48,983
Less preferred stock dividends	(4,018)	(3,843)	(7,882)	(7,669)
Net income available to common stockholders	$ 13,531	$ 17,787	$ 32,368	$ 41,314
Net income per common share:
Basic and diluted net income per common share	$ 0.14	$ 0.19	$ 0.34	$ 0.43
Weighted average common shares outstanding:
Basic (in shares)	95,756	95,648	95,755	95,631
Diluted (in shares)	95,916	95,786	95,895	95,766
Cash dividends declared per share:
Common (in dollars per share)	$ 0.21	$ 0.23	$ 0.42	$ 0.49
Series E Preferred [Member]
Cash dividends declared per share:
Series E preferred (in dollars per share)	$ 0.47	$ 0.47	$ 0.94	$ 0.94