Foreign Currency Derivative Instruments Foreign Currency Derivative Instruments (Schedule of Gross Amounts, Amounts Offset, and Net Amounts) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross amounts of recognized asset (liability)	$ 66
Gross amounts of recognized asset (liability)		$ (1,993)
Gross amounts offset in the consolidated balance sheets	50
Gross amounts offset in the consolidated balance sheets		350
Net amount of recognized asset (liability) presented in the consolidated balance sheets	$ 16
Net amount of recognized asset (liability) presented in the consolidated balance sheets		$ (1,643)