Stockholders' Equity - Activity In Treasury Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Treasury Stock, Shares [Roll Forward]
Balance, beginning of year (in shares)	1,557,054	1,498,202
Purchases (in shares)	0	63,844
Issuances (in shares)	0	4,992
Balance, end of year (in shares)	1,557,054	1,557,054	1,498,202
Treasury Stock, Value [Roll Forward]
Balance, beginning of year	$ 38,148	$ 36,706
Purchases	0	1,564
Issuances	0	122	$ 3
Balance, end of year	$ 38,148	$ 38,148	$ 36,706