Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 352,664	$ 331,168	$ 322,559
Point in time
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Over time
Disaggregation of Revenue [Line Items]
Revenues	352,664	331,168	322,559
Corporate
Disaggregation of Revenue [Line Items]
Revenues	169,732	148,981	135,353
Small office home office (“SoHo”)
Disaggregation of Revenue [Line Items]
Revenues	182,390	181,784	186,237
Other
Disaggregation of Revenue [Line Items]
Revenues	$ 542	$ 403	$ 969