Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Summary of Outstanding Shares of Common Stock

The following table summarizes outstanding shares of common stock:

	Year ended December 31
In thousands	2019		2018		2017
Shares outstanding at beginning of year		43,959		43,614		43,550
Treasury shares issued for:
Restricted stock awards		188		304		28
Employee stock options exercised		101		41		36
Shares outstanding at end of year		44,248		43,959		43,614