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Other Current Assets - Schedule of Other Current Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]    
Income tax receivable $ 9,672 $ 10,886
Prepaid software maintenance 5,070 4,010
Prepaid vendor payments 3,992 4,492
Prepaid insurance 2,521 2,754
Prepaid taxes 1,625 591
Prepaid other 2,737 1,755
Other 966 998
Other current assets $ 26,583 $ 25,486