Summary of Significant Accounting Policies - Reconciliation of Restructuring Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended						12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Charged to restructuring costs	$ 800	$ 1,200	$ 900	$ 2,300	$ 2,300	$ 600	$ 2,630	$ 6,052	$ 3,571
Employee Termination Costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period		499				386	499	386	556
Charged to restructuring costs							814	2,525	1,870
Payments							(1,153)	(2,412)	(2,040)
Balance at end of period			499				160	499	386
Lease-Related Exit Costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period		$ 2,687				$ 1,223	2,687	1,223	127
Charged to restructuring costs							544	2,190	1,311
Payments							(808)	(726)	(215)
Balance at end of period			$ 2,687				2,423	2,687	1,223
Strategic Reduction Of Real Estate Footprint
Restructuring Reserve [Roll Forward]
Charged to restructuring costs							$ 1,300	$ 1,100	$ 0