Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Stockholders Equity Note [Abstract]

Summary of Share Count and Par Value Data Related to Shareholders' Equity

Share count and par value data related to shareholders' equity are as follows:

	As of December 31,
	2021		2020
Preferred Stock
Par value per share	No par value		No par value
Shares authorized		25,000,000		25,000,000
Shares outstanding		—		—
Common Stock
Par value per share	No par value		No par value
Shares authorized		75,000,000		75,000,000
Shares issued		57,245,060		57,076,410
Shares outstanding		32,178,715		32,276,787
Treasury stock
Shares held		25,066,345		24,799,623

Summary of Common Shares Outstanding

A roll forward of common shares outstanding is as follows:

	As of December 31,
	2021			2020
Balance at beginning of the year		32,276,787			32,472,406
Repurchases		(266,722	)		(342,731	)
Restricted stock unit issuances		168,650			147,112
Balance at end of period		32,178,715			32,276,787