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Stock-Based Incentive Plans (Schedule of Share-Based Compensation, Stock Options, Rollforward) (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
$ / shares
shares
Number of Optioned Shares  
Outstanding - beginning of period, shares (in shares) | shares 2,884,020
Granted, shares (in shares) | shares 594,617
Exercised, shares (in shares) | shares (424,122)
Forfeited, shares (in shares) | shares (291,534)
Expired, shares (in shares) | shares (128,608)
Outstanding - end of period, shares (in shares) | shares 2,634,373
Fully vested and exercisable - end of year (shares) | shares 1,154,459
Fully vested and expected to vest - end of period (shares) | shares 2,579,659
Wtd. Avg. Exercise Price  
Beginning of period (in dollars per share) | $ / shares $ 63.20
Granted (in dollars per share) | $ / shares 73.25
Exercised (in dollars per share) | $ / shares 52.95
Forfeited (in dollars per share) | $ / shares 62.36
Expired (in dollars per share) | $ / shares 88.67
End of period (in dollars per share) | $ / shares 65.94
Fully vested and exercisable - end of year (in dollars per share) | $ / shares 68.18
Fully vested and expected to vest - end of year(in dollars per share) | $ / shares $ 66.01
Wtd. Avg. Remaining Contractual Term (years)  
Outstanding — at December 31, 2021 7 years 2 months 12 days
Fully vested and exercisable — end of year 5 years 7 months 6 days
Fully vested and expected to vest - end of year 7 years 1 month 6 days
Aggregate Intrinsic Value (in thousands)  
Outstanding — at December 31, 2021 | $ $ 61,693
Fully vested and exercisable — end of year | $ 25,149
Fully vested and expected to vest — end of year | $ $ 60,305