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Stock-Based Compensation (Details 5)
12 Months Ended
Dec. 31, 2020
$ / 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 256,187
Granted (in shares) | shares 97,842
Forfeited (in shares) | shares (24,037)
Additional Earned (in shares) | shares 0
Issued (in shares) | shares (102,567)
Awards Outstanding | shares 227,425
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Awards Outstanding (in dollars per share) | $ / shares $ 51.33
Granted (in dollars per share) | $ / shares 45.79
Forfeited (in dollars per share) | $ / shares 71.43
Additional earned (in dollars per share) | $ / shares 0
Issued (in dollars per share) | $ / shares 41.86
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 141,244
Granted (in shares) | shares 56,249
Forfeited (in shares) | shares (11,174)
Additional Earned (in shares) | shares 39,029
Issued (in shares) | shares (76,922)
Awards Outstanding | shares 148,426
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Awards Outstanding (in dollars per share) | $ / shares $ 56.58
Granted (in dollars per share) | $ / shares 29.86
Forfeited (in dollars per share) | $ / shares 42.52
Additional earned (in dollars per share) | $ / shares 47.11
Issued (in dollars per share) | $ / shares 47.11
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 90,327
Granted (in shares) | shares 28,125
Forfeited (in shares) | shares (6,347)
Additional Earned (in shares) | shares 15,271
Issued (in shares) | shares (53,163)
Awards Outstanding | shares 74,213
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]  
Awards Outstanding (in dollars per share) | $ / shares $ 85.21
Granted (in dollars per share) | $ / shares 104.35
Forfeited (in dollars per share) | $ / shares 103.26
Additional earned (in dollars per share) | $ / shares 73.29
Issued (in dollars per share) | $ / shares 73.29
Awards Outstanding (in dollars per share) | $ / shares