Revenues and Business Information (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Schedule of Geographical Distribution of Revenues and Assets

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Revenues:
United States	$	191,795	$	172,168	$	446,721	$	544,407
Europe		31,729		30,651		54,450		67,983
Rest of World		8,176		4,904		21,835		35,156
Total	$	231,700	$	207,723	$	523,006	$	647,546

	September 30,		December 31,
	2019		2018
Assets:
United States	$	682,534	$	756,053
Europe		47,936		55,064
Rest of World		75,767		103,258
Total	$	806,237	$	914,375