Resale and Repurchase Agreements (Tables)

6 Months Ended

Jun. 30, 2015

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		Securities Collateral Received/Pledged			Net Amount
June 30, 2015
Total resale agreements, subject to master netting arrangements	$	1,500,000	$	(450,000	)	$	1,050,000	$	—	$	(1,050,000	)	$	—
Total repurchase agreements, subject to master netting arrangements	2,115,693		(450,000		)	1,665,693		—		(1,665,693		)	—
December 31, 2014
Total resale agreements, subject to master netting arrangements	$	1,500,000	$	(450,000	)	$	1,050,000	$	—	$	(1,049,370	)	$	630
Total repurchase agreements, subject to master netting arrangements	2,308,678		(450,000		)	1,858,678		—		(1,858,678		)	—

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, 2015
Repurchase agreements, secured by:
U.S. government and federal agency obligations	$	124,241	$	24,799	$	10,219	$	159,259
Government-sponsored enterprise obligations	349,799		41,830		22,122		413,751
Agency mortgage-backed securities	340,790		103,537		324,659		768,986
Asset-backed securities	653,697		120,000		—		773,697
Total repurchase agreements, gross amount recognized	$	1,468,527	$	290,166	$	357,000	$	2,115,693