Derivative Assets And Collateral Received (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013	Sep. 30, 2013
Derivative [Line Items]
Gross amounts of recognized assets	$ 137,742,000		$ 181,866,000	$ 215,116,000
Derivative Assets not subject to master netting agreements	3,200,000			16,900,000
Subject to Master Netting Agreements
Derivative [Line Items]
Gross amounts of recognized assets	134,534,000	[1]		198,238,000	[1]
Gross amounts offset in the Statement of Condition	0			0
Net amounts of assets presented in the Statement of Condition	134,534,000	[1],[2]		198,238,000	[1],[2]
Derivative liabilities available for offset	(24,210,000)			(36,770,000)
Collateral Received	(110,262,000)			(161,468,000)
Net amount	62,000			0
Interest Rate Contract [Member] | Subject to Master Netting Agreements
Derivative [Line Items]
Gross amounts of recognized assets	134,534,000			198,238,000
Net amounts of assets presented in the Statement of Condition	$ 134,534,000			$ 198,238,000

[1] 2014 and 2013are comprised entirely of interest rate derivative contracts.

[2] Included in Derivative Assets on the Consolidated Condensed Statements of Condition. As of September 30, 2014 and 2013, $3.2 million and $16.9 million, respectively, of derivative assets (primarily capital markets forward contracts) have been excluded from these tables because they are generally not subject to master netting or similar agreements.