Segment Information (Summary of Inter-Segment Eliminations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues, net	$ 691,741	$ 734,375
Corporate / Inter-segment Eliminations
Segment Reporting Information [Line Items]
Revenues, net	(3,395)	(2,346)
Corporate / Inter-segment Eliminations | Domestic Operations
Segment Reporting Information [Line Items]
Revenues, net	(670)	(1,361)
Corporate / Inter-segment Eliminations | International & Other
Segment Reporting Information [Line Items]
Revenues, net	$ (2,725)	$ (985)