Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 104,843	$ 104,060
Less: Accumulated depreciation	(72,800)	(72,237)
Total property and equipment, net	32,043	31,823
Land
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	2,811	2,811
Building and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	36,366	35,188
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	49,169	47,651
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	14,400	14,274
Aircraft
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	2,038	4,075
Other
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 59	$ 61