Employee Benefit Plans - Stock Appreciation Right Activity (Details) - Stock Appreciation Rights (SARs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number
Outstanding (in shares)	67,000	50,000
Stock awards (in shares)	18,000	21,000
Forfeited (in shares)	(12,000)	(4,000)
Outstanding (in shares)	73,000	67,000
Weighted Average Exercisable Price
Weighted Average Exercisable Price, Outstanding (in dollars per share)	$ 20.54	$ 21.64
Granted (in dollars per share)	15.19	18.12
Weighted Average Exercisable Price Forfeited (in dollars per share)	21.72	21.67
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 19.02	$ 20.54