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Shareholders' Equity (Detail) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]      
Shares outstanding at beginning of year (in shares) 44,368 44,248 43,959
Treasury shares issued for:      
Restricted stock awards (in shares) 181 110 188
Employee stock options exercised (in shares) 0 10 101
Shares outstanding at end of year (in shares) 44,549 44,368 44,248