Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total Cost	$ 146,491	$ 143,166
Accumulated Depreciation	(94,766)	(89,937)
Property and Equipment, net	$ 51,725	53,229
Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	1 year
Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	15 years
Computer Software and Hardware
Property, Plant and Equipment [Line Items]
Total Cost	$ 87,443	85,894
Computer Software and Hardware | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	1 year
Computer Software and Hardware | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	7 years
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Total Cost	$ 35,348	33,379
Transportation Equipment
Property, Plant and Equipment [Line Items]
Total Cost	$ 17,851	17,851
Transportation Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Transportation Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	12 years
Office Furniture and Equipment
Property, Plant and Equipment [Line Items]
Total Cost	$ 5,849	$ 6,042
Office Furniture and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	4 years
Office Furniture and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	15 years