Securities Sold Under Agreements To Repurchase And Collateral Pledged By Counterparties (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Securities Sold Under Agreements To Repurchase [Abstract]
Gross amounts of recognized liabilities	$ 475,530		$ 433,761
Gross amounts offset in the Statement of Condition	0		0
Net amounts of liabilities presented in the Statement of Condition	475,530	442,789	433,761
Offsetting securities purchased under agreements to resell	(61,094)		(3,455)
Securities Collateral	(414,373)		(430,295)
Net amount	$ 63		$ 11