Stock Option Summary (Details) - Share-based Payment Arrangement, Option [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
[Line Items]
Outstanding, beginning balance (in shares)	393	433	433
Outstanding, beginning balance, weighted average exercise price per share (in dollars per share)	$ 61.18	$ 61.95	$ 61.95
Outstanding, weighted average remaining contractual life	5 years 6 months	6 years 8 months 12 days	5 years 10 months 24 days	6 years 10 months 24 days
Outstanding, beginning balance, aggregate intrinsic value	$ 4,737	$ 14,697	$ 14,697
Granted (in shares)	0	0
Granted, weighted average exercise price (in dollars per share)
Granted, weighted average grant date fair value	$ 0
Exercised (in shares)	0	(24)
Exercised, weighted average exercise price (in dollars per share)		$ 67.04
Exercised, aggregate intrinsic value		$ 926
Forfeited (in share)	(2)	(4)
Forfeited, weighted average grant date fair value (in dollars per share)	$ 87.27	$ 80.90
Outstanding, ending balance (in shares)	391	405	393	433
Outstanding, ending balance, weighted average exercise price per share (in dollars per share)	$ 61.03	$ 61.48	$ 61.18	$ 61.95
Outstanding, weighted average remaining contractual life	5 years 6 months	6 years 8 months 12 days	5 years 10 months 24 days	6 years 10 months 24 days
Outstanding, ending balance, aggregate intrinsic value	$ 2,173	$ 11,012	$ 4,737	$ 14,697
Exercisable (in shares)	340
Exercisable, weighted average exercise price (in dollars per share)	$ 58.04
Exercisable, weighted average remaining contractual term	5 years 2 months 12 days
Exercisable, aggregate intrinsic value	$ 2,173