Repurchase Agreements (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of Repurchase Agreements [Abstract]

Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block]

The following table provides information on the remaining term to maturity and original term to maturity for the Company’s repurchase agreements as of the periods indicated:

	December 31, 2017			December 31, 2016
Remaining Term to Maturity	Balance		WAVG Original Term to Maturity	Balance		WAVG Original Term to Maturity
Less than 30 days	$	2,240,791	49	$	2,480,213	58
30 to 90 days	274,231		90	418,739		87
91 to 180 days	50,880		121	—		—
Total	$	2,565,902	54	$	2,898,952	63

Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]

The Company’s repurchase agreements outstanding as of December 31, 2017 and December 31, 2016 are summarized in the following tables:

	December 31, 2017						December 31, 2016
Collateral Type	Balance		Weighted Average Rate		Fair Value of Collateral Pledged		Balance		Weighted Average Rate		Fair Value of Collateral Pledged
Agency RMBS	$	836,281	1.47	%	$	867,120	$	1,157,302	0.82	%	$	1,191,147
Non-Agency RMBS	—		—	%	—		26,149		1.98	%	31,952
Agency CMBS	1,003,146		1.44	%	1,071,904		1,005,726		0.82	%	1,095,002
Non-Agency CMBS	15,508		2.47	%	18,212		66,881		1.63	%	77,840
Agency CMBS IO	324,163		2.17	%	372,077		346,892		1.57	%	407,481
Non-Agency CMBS IO	263,694		2.43	%	311,571		291,199		1.67	%	341,139
U.S. Treasuries	123,110		1.85	%	124,215		—		—	%	—
Securitization financing bond	—		—	%	—		4,803		2.00	%	5,278
Total repurchase agreements	$	2,565,902	1.67	%	$	2,765,099	$	2,898,952	1.03	%	$	3,149,839

Schedule of Repurchase Agreement Counterparties with Whom Repurchase Agreements Exceed 10 Percent of Stockholders' Equity [Table Text Block]

The following table lists the counterparties with whom the Company had over 10% of its shareholders’ equity at risk (defined as the excess of collateral pledged over the borrowings outstanding):

	December 31, 2017
Counterparty Name	Balance		Weighted Average Rate		Equity at Risk
Wells Fargo Bank, N. A. and affiliates	$	311,351	2.43	%	$	56,383