Derivative Assets And Collateral Received (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Derivative [Line Items]
Gross amounts of recognized assets		$ 196,989	$ 104,365	$ 115,230
Derivative Assets not subject to master netting agreements		21,600		5,400
Derivatives, Interest Rate Contracts | Subject to Master Netting Agreements
Derivative [Line Items]
Gross amounts of recognized assets	[1]	175,403		109,874
Gross amounts offset in the Statement of Condition	[1]	0		0
Net amounts of assets presented in the Statement of Condition	[1],[2]	175,403		109,874
Derivative liabilities available for offset	[1]	(13,963)		(15,750)
Collateral Received	[1]	(141,426)		(93,656)
Net amount	[1]	$ 20,014		$ 468

[1] 201 6 and 2015 are comprised entirely of interest rate derivative contracts.

[2] In cluded in Derivative a ssets on the Consolidated Condensed Statements of Condition. As of June 30 , 2016 and 2015 , $ 21 . 6 million and $ 5.4 million, respectively, of derivative assets (primarily fixed income forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements.