Subsequent Events (Details) $ / shares in Units, $ in Thousands			1 Months Ended			12 Months Ended
	Feb. 01, 2022 $ / shares	Jan. 21, 2022 ft²	Jan. 31, 2022 USD ($) ft²	Sep. 30, 2021	Jul. 31, 2021	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares
Subsequent Event [Line Items]
Cash dividends declared (in dollars per share) | $ / shares						$ 0.34	$ 0.55
Lease termination date				Aug. 31, 2023	Oct. 31, 2023
Additional lease payments | $						$ 2,521	$ 2,330
Subsequent Event
Subsequent Event [Line Items]
Area of space occupied under non-cancellable operating lease | ft²		45,050	74,000
Lease termination date		Dec. 31, 2025
Extended lease termination date			Oct. 31, 2036
Additional lease payments | $			$ 78,000
Common Class A | Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared (in dollars per share) | $ / shares	$ 0.53
Dividend declared date	Feb. 01, 2022
Dividend payable date	Feb. 25, 2022
Dividend record date	Feb. 11, 2022