Derivative Assets And Collateral Received (Details) - USD ($)		Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Derivative [Line Items]
Gross amounts of recognized assets		$ 115,230,000	$ 134,088,000	$ 162,067,000
Derivative Assets not subject to master netting agreements		5,400,000		5,100,000
Derivatives, Interest Rate Contracts | Subject to Master Netting Agreements
Derivative [Line Items]
Gross amounts of recognized assets	[1]	109,874,000		156,919,000
Gross amounts offset in the Statement of Condition	[1]	0		0
Net amounts of assets presented in the Statement of Condition	[1],[2]	109,874,000		156,919,000
Derivative liabilities available for offset	[1]	(15,750,000)		(26,475,000)
Collateral Received	[1]	(93,656,000)		(129,064,000)
Net amount	[1]	$ 468,000		$ 1,380,000

[1] 201 5 and 2014 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 , 201 5 and 201 4 , $ 5 . 4 million and $ 5.1 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.