Acquisition (Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 16, 2021	Oct. 01, 2020
Business Acquisition [Line Items]
Estimated intangible assets acquired	$ 77,386	$ 62,287
Portico
Business Acquisition [Line Items]
Estimated intangible assets acquired			$ 19,900
MHT Partners
Business Acquisition [Line Items]
Estimated intangible assets acquired				$ 1,224
Trade name
Business Acquisition [Line Items]
Estimated intangible assets acquired	$ 1,431	$ 1,031
Trade name | Portico
Business Acquisition [Line Items]
Estimated intangible assets acquired			400
Estimated average remaining useful lives	1 year
Trade name | MHT Partners
Business Acquisition [Line Items]
Estimated intangible assets acquired				131
Estimated average remaining useful lives		3 years
Customer relationships
Business Acquisition [Line Items]
Estimated intangible assets acquired	$ 57,634	$ 52,040
Customer relationships | Portico
Business Acquisition [Line Items]
Estimated intangible assets acquired			13,400
Estimated average remaining useful lives	4 years
Customer relationships | MHT Partners
Business Acquisition [Line Items]
Estimated intangible assets acquired				749
Estimated average remaining useful lives		4 years
Backlog
Business Acquisition [Line Items]
Estimated intangible assets acquired	$ 6,100	$ 0
Estimated average remaining useful lives	1 year
Backlog | Portico
Business Acquisition [Line Items]
Estimated intangible assets acquired			$ 6,100
Estimated average remaining useful lives	1 year
Non-compete agreements
Business Acquisition [Line Items]
Estimated intangible assets acquired	$ 344	$ 344
Estimated average remaining useful lives	5 years
Non-compete agreements | MHT Partners
Business Acquisition [Line Items]
Estimated intangible assets acquired				$ 344
Estimated average remaining useful lives		5 years