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Stock-Based Compensation and Similar Arrangements - Restricted Stock Activity (Details) - $ / shares
12 Months Ended
Dec. 11, 2019
Sep. 20, 2019
Dec. 31, 2019
Weighted-average grant date fair value      
Non-vested at end of period (in dollars per share)   $ 58.84  
Restricted Stock      
Shares      
Non-vested at beginning of period (in shares)     47,328
Granted (in shares) 20,104   102,113
Vested (in shares)     (57,838)
Forfeited or cancelled (in shares)     (1,414)
Non-vested at end of period (in shares)     90,189
Weighted-average grant date fair value      
Non-vested at beginning of period (in dollars per share)     $ 52.56
Granted (in dollars per share)     61.49
Vested (in dollars per share)     57.00
Forfeited or cancelled (in dollars per share)     52.00
Non-vested at end of period (in dollars per share)     $ 59.84