Operating Segments and Geographic Information - Schedule of Revenue from External Customers and Long-Lived Assets Based on Physical Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Segment Revenues	$ 1,862,716	$ 2,131,278	$ 2,165,702
Percent of total revenues	100.00%	100.00%	100.00%
Long-lived assets	$ 418,004	$ 358,364	$ 324,209
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Segment Revenues	$ 1,015,340	$ 1,167,033	$ 1,206,401
Percent of total revenues	55.00%	55.00%	56.00%
Long-lived assets	$ 163,731	$ 152,214	$ 170,368
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Segment Revenues	$ 119,700	$ 162,975	$ 166,669
Percent of total revenues	6.00%	8.00%	8.00%
Long-lived assets	$ 32,063	$ 16,452	$ 13,352
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Segment Revenues	$ 111,835	$ 109,522	$ 107,582
Percent of total revenues	6.00%	5.00%	5.00%
Long-lived assets	$ 44,824	$ 40,247	$ 36,989
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Segment Revenues	$ 91,187	$ 92,913	$ 100,691
Percent of total revenues	5.00%	4.00%	4.00%
Long-lived assets	$ 63,100	$ 48,272	$ 39,724
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Segment Revenues	$ 524,654	$ 598,835	$ 584,359
Percent of total revenues	28.00%	28.00%	27.00%
Long-lived assets	$ 114,286	$ 101,179	$ 63,776