Restructuring and Other Charges (Summary of Activity Related to Accrued Restructuring and Other Charges ) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Beginning balance	$ 314		$ 998	$ 920
Additions	3,423	[1]	2,009	2,248
Cash payments	(3,491)		(2,387)	(1,998)
Adjustments	(223)		(306)	(172)
Ending balance	23		314	998
Employee Termination Charges
Restructuring Cost And Reserve [Line Items]
Beginning balance	87		932	775
Additions	2,910	[1]	1,354	2,082
Cash payments	(2,913)		(1,972)	(1,783)
Adjustments	(84)		(227)	(142)
Ending balance			87	932
Lease Contract Termination and Other Charges
Restructuring Cost And Reserve [Line Items]
Beginning balance	227		66	145
Additions	513	[1]	655	166
Cash payments	(578)		(415)	(215)
Adjustments	(139)		(79)	(30)
Ending balance	$ 23		$ 227	$ 66

[1] Total restructuring and other charges recognized in the Company’s consolidated statements of operations for the period presented included non-cash charges and adjustments, net of $0.1 million, which were excluded from the table above.