Revenues and Business Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Schedule of Geographical Distribution of Revenues and Assets

	Year Ended December 31,
	2018		2017		2016
Revenues:
United States	$	731,265	$	535,985	$	516,688
Europe		95,844		111,088		54,332
Rest of World		58,731		37,542		42,353
Total	$	885,840	$	684,615	$	613,373

	December 31,		December 31,
	2018		2017
Assets:
United States	$	756,053	$	519,933
Europe		55,064		83,834
Rest of World		103,258		95,301
Total	$	914,375	$	699,068