Derivative Instruments and Hedging Activities (Details) - Offsetting Derivatives - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Assets
Gross amounts recognized		$ 52,551	$ 16,233
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	52,551	16,233
Offsetting derivative positions		(20,830)	(4,791)
Cash collateral pledged		0	0
Derivative Asset, Net credit exposure		31,721	11,442
Liabilities
Gross amounts recognized		52,043	21,039
Less: amounts offset in the Consolidated Statements of Financial Condition		0	0
Net amount presented in the Consolidated Statements of Financial Condition	[1]	52,043	21,039
Offsetting derivative positions		(20,830)	(4,791)
Cash collateral pledged		(31,213)	(16,248)
Derivative Liability, Net credit exposure		$ 0	$ 0

[1] Included in other assets or other liabilities in the Consolidated Statements of Financial Condition.