XML 52 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1
Hedging Activities And Financial Instruments (Narrative) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Foreign currency contracts $ 38,498 $ 39,600