Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 59,224	$ 58,718
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(21,778)	(21,070)
Property, Plant and Equipment, Net	37,446	37,648
Depreciation Expense	8,400	7,500	$ 6,800
Increase (Decrease) in Other Noncurrent Assets		10,500
Net loss (gain) from property disposals	0	(1,943)	$ 0
Office furnishings, leasehold improvements, computer equipment and computer software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	38,489	38,178
Transportation and construction equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 20,735	$ 20,540