Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash	$ 266,692	$ 265,232
Cash collateral posted to counterparties	15,089	17,162
Agency Securities (including pledged securities of $6,818,582 at September 30, 2018 and $7,094,766 at December 31, 2017)	6,961,377	7,478,966
Derivatives, at fair value	240,813	37,211
Accrued interest receivable	22,398	22,165
Prepaid and other	1,524	1,600
Subordinated loans due from BUCKLER Securities LLC	105,000	105,000
Total Assets	8,680,866	8,928,917
Liabilities:
Repurchase agreements	7,218,734	7,555,917
Cash collateral posted by counterparties	232,041	29,593
Derivatives, at fair value	5,840	7,948
Accrued interest payable- repurchase agreements	9,694	6,452
Accounts payable and other accrued expenses	6,284	2,956
Total Liabilities	7,472,593	7,602,866
Commitments and contingencies
Preferred stock, $0.001 par value, 50,000 shares authorized;
Common stock, $0.001 par value, 125,000 shares authorized, 42,335 and 41,877 shares issued and outstanding at September 30, 2018 and December 31, 2017	42	42
Additional paid-in capital	2,722,919	2,709,335
Accumulated deficit	(1,342,463)	(1,363,223)
Accumulated other comprehensive loss	(172,233)	(20,111)
Total Stockholders’ Equity	1,208,273	1,326,051
Total Liabilities and Stockholders’ Equity	8,680,866	8,928,917
Series A Preferred Stock
Preferred stock, $0.001 par value, 50,000 shares authorized;
Preferred stock: 8.250% Series A Cumulative Preferred Stock; 2,181 issued and outstanding ($54,514 aggregate liquidation preference); 7.875% Series B Cumulative Preferred Stock; 6,369 and 6,262 shares issued and outstanding at September 30, 2018 and December 31, 2017 ($159,232 and $156,560 aggregate liquidation preference, respectively)	2	2
Series B Preferred Stock
Preferred stock, $0.001 par value, 50,000 shares authorized;
Preferred stock: 8.250% Series A Cumulative Preferred Stock; 2,181 issued and outstanding ($54,514 aggregate liquidation preference); 7.875% Series B Cumulative Preferred Stock; 6,369 and 6,262 shares issued and outstanding at September 30, 2018 and December 31, 2017 ($159,232 and $156,560 aggregate liquidation preference, respectively)	6	6
Credit Risk and Non-Agency Securities
Assets
Securities, trading, at fair value	947,314	975,829
Interest-Only Securities
Assets
Securities, trading, at fair value	22,631	25,752
US Treasury Securities
Assets
Securities, trading, at fair value	$ 98,028	$ 0