Business Segments and Geographic Information - Geographic Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Geographical Information
Revenues	$ 2,256,612	$ 2,350,098	$ 2,477,922
Property and Equipment, Net	2,037,845	2,122,195	2,144,722
U.S. operations
Geographical Information
Revenues	2,043,157	2,123,045	2,216,401
Property and Equipment, Net	2,026,252	2,109,070	2,131,877
Australia operations
Geographical Information
Revenues	186,980	201,932	235,462
Property and Equipment, Net	11,491	12,908	12,215
South African operations
Geographical Information
Revenues	19,527	17,044	18,779
Property and Equipment, Net	102	127	182
United Kingdom operations
Geographical Information
Revenues	$ 6,948	8,077	7,280
Property and Equipment, Net		$ 90	$ 448