CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest income
Residential mortgage investments	$ 50,341	$ 57,092	$ 108,986	$ 116,537
Other	99	77	193	138
Interest income	50,440	57,169	109,179	116,675
Interest expense
Repurchase arrangements and similar borrowings	(20,098)	(15,542)	(39,312)	(30,949)
Unsecured borrowings	(2,122)	(2,122)	(4,245)	(4,244)
Interest expense	(22,220)	(17,664)	(43,557)	(35,193)
Net interest income (expense)	28,220	39,505	65,622	81,482
Other revenue (expense)
Salaries and benefits	(1,103)	(985)	(2,152)	(2,117)
Short-term incentive compensation	(830)	(397)	(1,522)	(937)
Long term incentive compensation	(227)	(624)	(835)	(1,250)
Other general and administrative expense	(1,170)	(967)	(2,319)	(2,170)
Miscellaneous other revenue (expense)	54	32	107	(53)
Operating expenses	(3,276)	(2,941)	(6,721)	(6,527)
Net income	24,944	36,564	58,901	74,955
Net income available to common stockholders
Net income	24,944	36,564	58,901	74,955
Less preferred stock dividends	(3,788)	(3,449)	(7,530)	(6,687)
Total net income (loss) available to common stockholders	$ 21,156	$ 33,115	$ 51,371	$ 68,268
Net income per common share
Basic (in dollars per share)	$ 0.22	$ 0.35	$ 0.54	$ 0.72
Diluted (in dollars per share)	$ 0.22	$ 0.35	$ 0.54	$ 0.71
Weighted average common shares outstanding
Basic (in shares)	95,501	95,399	95,485	95,374
Diluted (in shares)	95,689	95,626	95,682	95,583
Cash dividends declared per share
Common (in dollars per share)	$ 0.31	$ 0.34	$ 0.62	$ 0.68
Series E Preferred [Member]
Cash dividends declared per share
Series E Preferred (in dollars per share)	$ 0.47	$ 0.47	$ 0.94	$ 0.94