XML 37 R28.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Level 1 [Member]    
Investments, Fair Value Disclosure [Abstract]    
Investments $ 100 $ 100
Level 2 [Member]    
Investments, Fair Value Disclosure [Abstract]    
Forward exchange contracts, liability 100 $ 600
Level 2 [Member] | Carrying Value [Member]    
Investments, Fair Value Disclosure [Abstract]    
Long term debt 746,000  
Level 2 [Member] | Fair Value [Member]    
Investments, Fair Value Disclosure [Abstract]    
Long term debt $ 754,300