Business Combinations (Narrative) (Details) - USD ($)		3 Months Ended
	Dec. 08, 2020	Mar. 31, 2021	Mar. 31, 2020
Business Acquisition [Line Items]
Revenue		$ 331,555,000	$ 273,255,000
Net income		$ 28,139,000	22,829,000
Rouse Services LLC [Member]
Business Acquisition [Line Items]
Total consideration	$ 251,724,000
Cash consideration	250,265,000
Cash consideration, placed in escrow	$ 2,169,000
Common stock consideration (in shares)	312,193
Vesting period	3 years
Common stock consideration fair value	$ 1,459,000
Shares forfeited		55,510
Reversal of share based continuing employment costs		$ 98,000
Number of common shares expected to vest		256,683
Unrecognized share based continuing employment costs		$ 14,576,000	$ 0
Acquisition-related costs for legal, advisory, integration and other professional fees		2,922,000
Acquisition related share based continuing employment costs		$ 2,553,000
Rouse Services LLC [Member] | Employment Costs [Member]
Business Acquisition [Line Items]
Common stock consideration fair value	$ 20,735,000