Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

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,
	2020		2019
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		57,076,410		56,929,298
Shares outstanding		32,276,787		32,472,406
Treasury stock
Shares held		24,799,623		24,456,892

Summary of Common Shares Outstanding

A roll forward of common shares outstanding is as follows:

	As of December 31,
	2020		2019
Balance at beginning of the year		32,472,406		32,750,727
Repurchases		(342,731)		(420,770)
Restricted stock unit issuances		147,112		142,449
Balance at end of period		32,276,787		32,472,406