Other Current Assets - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Income tax receivable	$ 9,817	$ 10,886
Prepaid software maintenance	5,729	4,010
Prepaid vendor payments	5,207	4,492
Prepaid taxes	1,093	591
Prepaid insurance	1,026	2,754
Prepaid other	3,388	1,755
Other	1,338	998
Other current assets	$ 27,598	$ 25,486