v3.22.0.1

Stock-Based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands	1 Months Ended			12 Months Ended
	May 31, 2021 director $ / shares shares	May 31, 2020 director $ / shares shares	Jun. 30, 2019 director $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities authorized | shares					1,000,000
Shares available to be granted (in shares) | shares				889,650,000,000
Stock options granted (in shares) | shares				0	0	0
Total intrinsic value of options exercised | $				$ 3,100	$ 400	$ 700
Total unrecognized compensation cost related to non-vested stock options | $				$ 300
Granted (in shares) | shares						0
Employee stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vested period				5 years
Stock option expiration period				10 years
Weighted average period of compensation cost				1 year
Stock appreciation rights (“SARs”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vested period				5 years
Stock option expiration period				10 years
Weighted average period of compensation cost				2 years 4 months 24 days
Liability balance | $				$ 22,100	$ 5,300
Stock appreciation rights outstanding (in shares) | shares				467,668	679,500
Weighted average grant date fair value (in usd per share) | $ / shares				$ 90.04	$ 17.94	$ 17.19
Intrinsic value of SARs exercised | $				$ 5,400	$ 1,100	$ 2,100
Total unrecognized compensation cost related to non-vested SARs | $				$ 20,300
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vested period				5 years
Weighted average period of compensation cost				2 years 6 months
Weighted average grant date fair value (in usd per share) | $ / shares				$ 0	$ 58.90	$ 54.49
Total unrecognized compensation cost related to non-vested SARs | $				$ 2,430
Granted (in shares) | shares				0	37,000	60,000
Total fair value of shares vested during year | $				$ 1,130
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option vested period				3 years
Total unrecognized compensation cost related to non-vested stock options | $				$ 4,220
Weighted average period of compensation cost				2 years 4 months 24 days
Weighted average grant date fair value (in usd per share) | $ / shares				$ 61.92
Granted (in shares) | shares				98,600	0
Stock grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in usd per share) | $ / shares	$ 78.29	$ 44.31	$ 53.81
Granted (in shares) | shares	1,250	1,100	1,000
Number of non-employee directors | director	5	5	5

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