Stock-Based Compensation - Stock Appreciation Rights (Details) - Stock Appreciation Rights (SARs) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) $ / shares shares
NUMBER OF SHARES
Beginning balance (in shares) | shares	212,044
Granted (in shares) | shares	5,000
Canceled (in shares) | shares	(13,801)
Ending balance (in shares) | shares	203,243
Stock exercisable (in shares) | shares	66,546
WEIGHTED AVERAGE EXERCISE PRICE
Beginning balance (in dollars per share) | $ / shares	$ 32.28
Granted (in dollars per share) | $ / shares	18.68
Canceled (in dollars per share) | $ / shares	28.43
Ending balance (in dollars per share) | $ / shares	32.20
Stock exercisable (in dollars per share) | $ / shares	$ 45.16
WEIGHTED AVERAGE REMAINING CONTRACTUAL LIFE (YEARS)
Stock outstanding (in years)	3 years 3 months 18 days
Stock exercisable (in years)	2 years 6 months
AGGREGATE INTRINSIC VALUE
Stock outstanding | $	$ 280
Stock exercisable | $	$ 3