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Share-Based Compensation - Restricted Stock Units, PSU and RSU Awards (Details) - $ / shares
Jul. 31, 2019
May 01, 2019
Mar. 25, 2019
Feb. 20, 2019
Jan. 02, 2019
Aug. 02, 2018
Jun. 25, 2018
Feb. 21, 2018
Jan. 02, 2018
Aug. 02, 2017
Feb. 22, 2017
Jan. 03, 2017
Restricted Stock | Non Employee Directors Plan                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of shares awarded (shares)   2,830     30,891 1,687     21,304     14,294
Price per share (usd per share)   $ 29.44     $ 28.32 $ 49.38     $ 46.93     $ 61.21
PSU | 2014 Omnibus Share Incentive Plan (2014 Plan)                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of shares awarded (shares) 4,250     85,000       85,000     100,000  
Price per share (usd per share) $ 30.33     $ 27.71       $ 46.35     $ 56.52  
RSU | 2014 Omnibus Share Incentive Plan (2014 Plan)                        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of shares awarded (shares)     5,000 133,750     2,000 125,000   48,700 50,000  
Price per share (usd per share)     $ 26.55 $ 27.71     $ 44.78 $ 46.35   $ 49.75 $ 56.52