Stock-based Compensation - Phantom Stock Plan (Details) - Phantom Share Units (PSUs) [Member] - Phantom Stock Plan [Member]	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Outstanding, beginning balance (in shares) | shares	120,248
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 16.64
Granted (in shares) | shares	10,232
Granted (in dollars per share) | $ / shares	$ 19.85
Forfeited (in shares) | shares	(11)
Forfeited (in dollars per share) | $ / shares	$ 18.25
Distributions (in shares) | shares	(2,606)
Distributions (in dollars per share) | $ / shares	$ 19.03
Outstanding, ending balance (in shares) | shares	127,863
Outstanding, ending (in dollars per share) | $ / shares	$ 22.60
Vested at September 30, 2021 (in shares) | shares	127,763
Vested at September 30, 2021 (in dollars per share) | $ / shares	$ 22.60