CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Residential mortgage investments	$ 67,649	$ 57,073	$ 201,989	$ 168,017
Other	350	366	1,063	757
Interest income	67,999	57,439	203,052	168,774
Interest expense:
Secured borrowings	(54,393)	(36,655)	(147,655)	(98,745)
Unsecured borrowings	(1,910)	(1,910)	(5,701)	(5,701)
Interest expense	(56,303)	(38,565)	(153,356)	(104,446)
Net interest income (expense)	11,696	18,874	49,696	64,328
Other revenue (expense):
Compensation-related expense	(1,913)	(1,073)	(5,521)	(4,021)
Other general and administrative expense	(1,184)	(1,097)	(3,320)	(3,435)
Miscellaneous other revenue	81	48	233	130
Operating expenses	(3,016)	(2,122)	(8,608)	(7,326)
Net income	8,680	16,752	41,088	57,002
Net income available to common stockholders:
Net income	8,680	16,752	41,088	57,002
Less preferred stock dividends	(4,842)	(4,718)	(14,526)	(12,600)
Net income available to common stockholders	$ 3,838	$ 12,034	$ 26,562	$ 44,402
Net income per common share:
Basic and diluted	$ 0.04	$ 0.13	$ 0.29	$ 0.46
Weighted average common shares outstanding:
Basic (in shares)	91,206	95,792	92,202	95,768
Diluted (in shares)	91,346	95,923	92,317	95,905
Cash dividends declared per share:
Common (in dollars per share)	$ 0.11	$ 0.19	$ 0.41	$ 0.61
Series E Preferred [Member]
Cash dividends declared per share:
Series E preferred (in dollars per share)	$ 0.47	$ 0.47	$ 1.41	$ 1.41