Derivative Assets And Collateral Received (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Derivative [Line Items]
Gross amounts of recognized assets		$ 160,736	$ 104,365	$ 152,548
Derivative Assets not subject to master netting agreements		11,900		16,500
Derivatives, Interest Rate Contracts | Subject to Master Netting Agreements
Derivative [Line Items]
Gross amounts of recognized assets	[1]	148,883		136,098
Gross amounts offset in the Statement of Condition	[1]	0		0
Net amounts of assets presented in the Statement of Condition	[1],[2]	148,883		136,098
Derivative liabilities available for offset	[1]	(8,823)		(9,748)
Collateral Received	[1]	(125,095)		(121,401)
Net amount	[1]	$ 14,965		$ 4,949

[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 September 30 , 2016 and 2015 , $ 11 . 9 million and $ 16.5 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.