Securities Sold Under Agreements To Repurchase And Collateral Pledged By Counterparties (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Securities Sold Under Agreements To Repurchase [Abstract]
Gross amounts of recognized liabilities	$ 332,329,000		$ 479,384,000
Gross amounts offset in the statement of Condition	0		0
Net amounts of liabilities presented in the Statement of Condition	332,329,000	$ 562,214,000	479,384,000
Offsetting securities purchased under agreements to resell	(2,909,000)		(53,382,000)
Securities Collateral	(329,420,000)		(425,986,000)
Net amount	$ 0		$ 16,000