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Stock-based Compensation - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended
Nov. 30, 2019
Mar. 31, 2020
Sep. 30, 2019
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation costs related to non-vested stock options award   $ 0.1 $ 0.1
Weighted average period to recognize remaining cost   9 months 9 days  
Performance-Based Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period   3 years  
Performance based restricted stock settled in cash payment (in shares) 135,337    
Cash settlement of performance-based restricted stock $ 2.1    
Nonvested Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average period to recognize remaining cost   2 years  
Unrecognized compensation costs related to non-vested stock awards   $ 13.3 $ 9.0