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Stock-Based Compensation (Details 5)
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Restricted stock units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]  
Awards Outstanding (in shares) | shares 263,981
Granted (in shares) | shares 124,900
Forfeited (in shares) | shares (24,088)
Additional Earned (in shares) | shares 0
Issued (in shares) | shares (108,606)
Awards Outstanding | shares 256,187
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Awards Outstanding (in dollars per share) | $ / shares $ 45.07
Granted (in dollars per share) | $ / shares 48.91
Forfeited (in dollars per share) | $ / shares 54.85
Additional earned (in dollars per share) | $ / shares 0
Issued (in dollars per share) | $ / shares 48.54
Awards Outstanding (in dollars per share) | $ / shares
Service And Performance Based Rights [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]  
Awards Outstanding (in shares) | shares 147,051
Granted (in shares) | shares 58,935
Forfeited (in shares) | shares (5,081)
Additional Earned (in shares) | shares 36,990
Issued (in shares) | shares (96,651)
Awards Outstanding | shares 141,244
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Awards Outstanding (in dollars per share) | $ / shares $ 44.71
Granted (in dollars per share) | $ / shares 59.87
Forfeited (in dollars per share) | $ / shares 59.23
Additional earned (in dollars per share) | $ / shares 31.34
Issued (in dollars per share) | $ / shares 31.34
Awards Outstanding (in dollars per share) | $ / shares
Service And Market Based Rights [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]  
Awards Outstanding (in shares) | shares 123,938
Granted (in shares) | shares 29,467
Forfeited (in shares) | shares (3,417)
Additional Earned (in shares) | shares 51,726
Issued (in shares) | shares (111,387)
Awards Outstanding | shares 90,327
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Awards Outstanding (in dollars per share) | $ / shares $ 64.78
Granted (in dollars per share) | $ / shares 96.10
Forfeited (in dollars per share) | $ / shares 82.02
Additional earned (in dollars per share) | $ / shares 48.87
Issued (in dollars per share) | $ / shares 48.87
Awards Outstanding (in dollars per share) | $ / shares