Resale and Repurchase Agreements (Tables)

6 Months Ended

Jun. 30, 2019

Resale and Repurchase Agreements [Abstract]

Resale and Repurchase Agreements [Table Text Block]

								Gross Amounts Not Offset in the Balance Sheet
(In thousands)	Gross Amount Recognized		Gross Amounts Offset in the Balance Sheet			Net Amounts Presented in the Balance Sheet		Financial Instruments Available for Offset		Securities Collateral Received/Pledged			Net Amount
June 30, 2019
Total resale agreements, subject to master netting arrangements	$	900,000	$	(200,000	)	$	700,000	$	—	$	(700,000	)	$	—
Total repurchase agreements, subject to master netting arrangements	2,227,704		(200,000		)	2,027,704		—		(2,027,704		)	—
December 31, 2018
Total resale agreements, subject to master netting arrangements	$	1,150,000	$	(450,000	)	$	700,000	$	—	$	(700,000	)	$	—
Total repurchase agreements, subject to master netting arrangements	2,393,219		(450,000		)	1,943,219		—		(1,943,219		)	—

Schedule of Underlying Assets of Repurchase Agreements [Table Text Block]

	Remaining Contractual Maturity of the Agreements
(In thousands)	Overnight and continuous		Up to 90 days		Greater than 90 days		Total
June 30, 2019
Repurchase agreements, secured by:
U.S. government and federal agency obligations	$	231,782	$	—	$	—	$	231,782
Government-sponsored enterprise obligations	48,153		—		—		48,153
Agency mortgage-backed securities	720,531		46,617		231,365		998,513
Non-agency mortgage-backed securities	300,839		—		—		300,839
Asset-backed securities	505,646		25,000		25,000		555,646
Other debt securities	92,771		—		—		92,771
Total repurchase agreements, gross amount recognized	$	1,899,722	$	71,617	$	256,365	$	2,227,704
December 31, 2018
Repurchase agreements, secured by:
U.S. government and federal agency obligations	$	387,541	$	150,000	$	100,000	$	637,541
Government-sponsored enterprise obligations	18,466		—		—		18,466
Agency mortgage-backed securities	882,744		31,774		213,752		1,128,270
Non-agency mortgage-backed securities	187,740		—		—		187,740
Asset-backed securities	322,680		—		—		322,680
Other debt securities	98,522		—		—		98,522
Total repurchase agreements, gross amount recognized	$	1,897,693	$	181,774	$	313,752	$	2,393,219