Repurchase Agreements (Tables)

3 Months Ended

Mar. 31, 2018

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 dates indicated:

	March 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	$	2,339,638	51	$	2,240,791	49
30 to 90 days	274,254		8	274,231		90
91 to 180 days	—		—	50,880		121
Total	$	2,613,892	46	$	2,565,902	54

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

	March 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	$	1,059,749	1.77	%	$	1,120,858	$	836,281	1.47	%	$	867,120
Agency CMBS	912,095		1.75	%	959,385		1,003,146		1.44	%	1,071,904
Non-Agency CMBS	—		—	%	—		15,508		2.47	%	18,212
Agency CMBS IO	320,418		2.28	%	354,578		324,163		2.17	%	372,077
Non-Agency CMBS IO	249,482		2.75	%	295,606		263,694		2.43	%	311,571
U.S. Treasuries	72,148		2.00	%	73,343		123,110		1.85	%	124,215
Total repurchase agreements	$	2,613,892	1.92	%	$	2,803,770	$	2,565,902	1.67	%	$	2,765,099

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):

	March 31, 2018
Counterparty Name	Balance		Weighted Average Rate		Equity at Risk
Wells Fargo Bank, N. A. and affiliates	$	280,383	2.74	%	$	52,144