Derivative Instruments and Hedging Activities (Schedule of Offsetting of Derivative Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts of Recognized Liabilities	$ 574	$ 1,247
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts Of Liabilities Presented in the Balance Sheet	574	1,247
Gross Amounts Not Offset in the Balance Sheet, Financial Instruments Collateral	(29)	(10)
Gross Amounts Not Offset in the Balance Sheet, Cash Collateral	0	0
Net Amount	$ 545	$ 1,237