Repurchase Agreements (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Repurchase Agreements [Abstract]

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, 2018 and December 31, 2017 are summarized in the following tables:

	December 31, 2018						December 31, 2017
Collateral Type	Balance		Weighted Average Rate		Fair Value of Collateral Pledged		Balance		Weighted Average Rate		Fair Value of Collateral Pledged
Agency RMBS	$	1,887,878	2.66	%	$	1,998,922	$	836,281	1.47	%	$	867,120
Agency CMBS	919,833		2.51	%	986,861		1,003,146		1.44	%	1,071,904
Agency CMBS IO	253,258		2.96	%	285,247		324,163		2.17	%	372,077
Non-Agency CMBS IO	207,015		3.38	%	240,574		263,694		2.43	%	311,571
Non-Agency CMBS	—		—	%	—		15,508		2.47	%	18,212
U.S. Treasuries	—		—	%	—		123,110		1.85	%	124,215
Total repurchase agreements	$	3,267,984	2.69	%	$	3,511,604	$	2,565,902	1.67	%	$	2,765,099

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 dates indicated:

	December 31, 2018			December 31, 2017
Remaining Term to Maturity	Balance		WAVG Original Term to Maturity	Balance		WAVG Original Term to Maturity
Less than 30 days	$	2,319,911	56	$	2,240,791	49
30 to 90 days	948,073		89	274,231		90
91 to 180 days	—		—	50,880		121
Total	$	3,267,984	66	$	2,565,902	54

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 approximately 10% or more of its shareholders’ equity at risk (defined as the excess of collateral pledged over the borrowings outstanding) as of the date indicated:

	December 31, 2018
Counterparty Name	Balance		Weighted Average Rate		Equity at Risk
Wells Fargo Bank, N. A. and affiliates	$	292,859	3.19	%	$	43,698