Organization and Basis of Presentation Schedule of Revenue by Major Customer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 634,362	$ 602,723	$ 647,770
Government Contracts Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues	$ 83,256	$ 84,086	$ 86,644
Government Contracts Concentration Risk | Sales Revenue, Segment | Commercial Segment Rental Customer
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	22.00%	23.40%	21.20%
Government Contracts Concentration Risk | Sales Revenue, Net | Commercial Segment Rental Customer
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	16.20%	17.80%	16.70%