Stock-Based Compensation Plans - Restricted Stock Activity (Details) - Restricted Stock - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number Outstanding
Balance at the beginning of the period (in shares)	581,715	505,467
Shares granted (in shares)	327,550	319,350
Shares forfeited (in shares)	0	0
Shares vested (in shares)	(348,657)	(243,102)
Balance at the end of the period (in shares)	560,608	581,715
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 31.34	$ 37.70
Shares granted (in dollars per share)	42.40	19.00
Shares cancelled (in dollars per share)	0	0
Shares vested (in dollars per share)	28.66	28.35
Balance at the end of the period (in dollars per share)	$ 36.30	$ 31.34