Share Incentive Plans, Stock Option Activity (Details) - 2006, 2015 and 2021 Plans [Member] - Stock Options [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Stock Option Shares [Roll Forward]
Outstanding, beginning balance (in shares)	619,835	711,060	711,060
Granted (in shares)	100,000		119,500
Exercised (in shares)	(25,166)		(202,768)
Forfeited (in shares)	(7,217)		(7,957)
Outstanding, ending balance (in shares)	687,452		619,835
Weighted Average Exercise Price [Abstract]
Outstanding, beginning balance (in dollars per share)	$ 28.51	$ 19.58	$ 19.58
Granted (in dollars per share)	30.46		50.93
Exercised (in dollars per share)	16.14		10.22
Forfeited (in dollars per share)	29.53		33.22
Outstanding, ending balance (in dollars per share)	29.23		28.51
Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning balance (in dollars per share)	8.70	$ 6.42	6.42
Granted (in dollars per share)	10.23		13.58
Exercised (in dollars per share)	4.89		6.35
Forfeited (in dollars per share)	8.13		9.63
Outstanding, ending balance (in dollars per share)	$ 9.07		$ 8.70
Intrinsic value of options exercised	$ 0.4	$ 3.3

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Balance Type:	debit
Period Type:	duration

- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.