Derivative Assets And Collateral Received (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Gross amounts of recognized assets		$ 98,120	$ 121,654
Derivative Assets not subject to master netting agreements		17,300	33,700
Derivatives, Interest Rate Contracts | Subject to Master Netting Agreements
Derivative [Line Items]
Gross amounts of recognized assets	[1]	80,807	87,962
Gross amounts offset in the Statement of Condition	[1]	0	0
Net amounts of assets presented in the Statement of Condition	[1],[2]	80,807	87,962
Derivative liabilities available for offset	[1]	(18,674)	(25,953)
Collateral Received	[1]	(46,189)	(52,888)
Net amount	[1]	$ 15,944	$ 9,121

[1] Amounts are comprised entirely of interest rate derivative contracts.

[2] In cluded in Derivative assets on the Consolidated Condensed Statements of Condition. As of March 31 , 2017 and December 31, 2016, $ 17 . 3 million and $ 33.7 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.