Goodwill and Intangible Assets - Schedule of Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Intangible assets subject to amortization
Gross carrying amount	$ 244,554	$ 238,867
Accumulated amortization	(115,430)	(106,410)
Foreign currency translation adjustment	(8,262)	(8,281)
Total	120,862	124,176
Intangible assets with indefinite lives
Gross carrying amount	10,303	14,883
Foreign currency translation adjustment	(1,130)	(1,124)
Total	9,173	13,759
Total intangible assets, net	$ 130,035	$ 137,935