Stock-Based Compensation - Stock Appreciation Rights (Details) - Stock Appreciation Rights (SARs) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
NUMBER OF SHARES
Beginning balance (in shares) | shares	163,016
Granted (in shares) | shares	12,000
Canceled (in shares) | shares	(15,619)
Ending balance (in shares) | shares	159,397
Stock exercisable (in shares) | shares	32,610
WEIGHTED AVERAGE EXERCISE PRICE
Beginning balance (in dollars per share) | $ / shares	$ 41.70
Granted (in dollars per share) | $ / shares	18.51
Canceled (in dollars per share) | $ / shares	41.70
Ending balance (in dollars per share) | $ / shares	18.51
Stock exercisable (in dollars per share) | $ / shares	$ 52.03
WEIGHTED AVERAGE REMAINING CONTRACTUAL LIFE (YEARS)
Stock outstanding, weighted average remaining contractual life	3 years 9 months 18 days
Stock exercisable, weighted average remaining contractual life	3 years 2 months 12 days
AGGREGATE INTRINSIC VALUE
Stock outstanding | $	$ 1
Stock exercisable | $	$ 0