Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 104,933	$ 19,235	$ (5,752)	$ (42,752)	$ (43,854)	$ (23,511)	$ (5,752)	$ (23,511)
Other comprehensive income (loss) before reclassification							66	(237)
Other comprehensive income (loss), net of tax	(57)	71	52	240	187	(664)	66	(237)
Ending balance	212,146	104,933	19,235	(21,404)	(42,752)	(43,854)	212,146	(21,404)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(4,523)	(4,594)	(4,646)	(5,027)	(5,214)	(4,550)	(4,646)	(4,550)
Other comprehensive income (loss), net of tax	(57)	71	52	240	187	(664)
Ending balance	$ (4,580)	$ (4,523)	$ (4,594)	$ (4,787)	$ (5,027)	$ (5,214)	$ (4,580)	$ (4,787)