Employee Benefit Plans - Stock Appreciation Right Activity (Details) - Stock Appreciation Rights (SARs) [Member]	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Number
Outstanding (in shares) | shares	73,000
Stock awards (in shares) | shares	22,000
Exercised (in shares) | shares	(11,500)
Forfeited (in shares) | shares	(6,000)
Outstanding (in shares) | shares	77,500
Weighted Average Exercisable Price
Weighted Average Exercisable Price, Outstanding (in dollars per share) | $ / shares	$ 19.02
Granted (in dollars per share) | $ / shares	20.70
Weighted Average Exercisable Price Exercised (in dollars per share) | $ / shares	21.61
Weighted Average Exercisable Price Forfeited (in dollars per share) | $ / shares	18.00
Weighted Average Exercise Price, Outstanding (in dollars per share) | $ / shares	$ 19.19