Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities:
Net income (loss)	$ 20,990	$ (6,733)
Adjustments to reconcile net income to cash provided by operating activities:
Decrease (increase) in accrued interest receivable	(158)	(774)
(Decrease) increase in accrued interest payable	120	(778)
Loss (gain) on derivative instruments, net	8,233	36,496
Loss (gain) on sale of investments, net	183	3,784
Fair value adjustments, net	(59)	(119)
Amortization of investment premiums, net	74,737	66,650
Other amortization and depreciation	2,847	5,055
Stock-based compensation expense	1,475	1,355
Other operating activities	18	598
Net cash and cash equivalents provided by operating activities	108,386	105,534
Investing activities:
Purchase of investments	(1,000,070)	(298,699)
Principal payments received on investments	236,598	253,263
Proceeds from sales of investments	233,238	95,932
Principal payments received on mortgage loans held for investment, net	9,825	2,889
Investment in limited partnership	(6,000)	0
Net payments on derivatives not designated as hedges	10,968	5,951
Other investing activities	(135)	(5)
Net cash and cash equivalents used in investing activities	(537,512)	47,429
Financing activities:
Borrowings under (repayments of) repurchase agreements, net	497,930	(133,912)
Principal payments on non-recourse collateralized financing	(2,035)	(858)
Increase in restricted cash	(15,617)	(17,362)
Proceeds from issuance of common stock, net of issuance costs	59	107
Cash paid for repurchases of common stock	(6,688)	0
Payments related to tax withholding for share-based compensation	(557)	(505)
Dividends paid	(31,447)	(32,926)
Net cash and cash equivalents provided by (used in) financing activities	441,645	(185,456)
Net increase (decrease) in cash and cash equivalents	12,519	(32,493)
Cash and cash equivalents at beginning of period	43,944	69,330
Cash and cash equivalents at end of period	56,463
Supplemental Disclosure of Cash Activities:
Cash paid for interest	$ 8,842	$ 10,861