Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 08, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 119,490		$ 90,924
Workforce Solutions Group, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 957
Accounts receivable		11,991
Other current assets		59
Property and equipment		10
Right-of-use assets		1,078
Goodwill		22,066
Other intangible assets		14,200
Total assets acquired		50,361
Accounts payable and accrued expenses		3,562
Accrued compensation and benefits		1,387
Lease liability - current		316
Lease liability - non-current		762
Earnout liability		15,000
Total liabilities assumed		21,027
Net assets acquired		$ 29,334