Discontinued Operations - Additional Information (Details) - USD ($)		12 Months Ended
	Jun. 07, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Divestiture of business	$ 16,600,000
Pre-tax gain on divestiture	$ 8,300,000	$ (573,000)	$ 8,319,000
Final Adjustments To Purchase Agreement		600,000
Balance recorded for discontinued operation		0	0
Cash provided by operating activities, discontinued operations			100,000	$ 200,000
Cash provided by (used in) investing activities, discontinued operations		(200,000)	14,800,000
Maximum [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Additional proceeds from divestiture of business based on result of operations		$ 0	$ 2,500,000