XML 71 R57.htm IDEA: XBRL DOCUMENT v3.20.2
Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Outstanding at beginning of period (in shares) 963,832 969,928 963,832 969,928
Granted (in shares)     437,054 295,096
Converted (in shares)     (200,563) (153,464)
Expired (in shares)     (34,100) (5,600)
Forfeited (in shares)     (1,000) (2,600)
Outstanding at end of period (in shares)     1,165,223 1,103,360
Vested (in shares)     353,023 337,060
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Outstanding at beginning of period, Weighted average grant-date fair value (in dollars per share) $ 17.67 $ 15.89 $ 17.67 $ 15.89
Granted, Weighted average grant-date fair value (in dollars per share)     18.85 23.22
Converted, Weighted average grant-date fair value (in dollars per share)     19.87 17.29
Expired, Weighted average grant-date fair value (in dollars per share)     19.40 23.78
Forfeited, Weighted average grant-date fair value (in dollars per share)     18.90 22.16
Outstanding at end of period, Weighted average grant-date fair value (in dollars per share)     17.69 17.61
Vested (in dollars per share)     $ 8.25 $ 8.04
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Share-based compensation expense     $ 4.0 $ 3.4
Unrecognized share-based compensation expense     $ 11.3  
Unrecognized share-based compensation, weighted average recognition period     1 year 7 months 6 days  
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Requisite service period     3 years  
Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Requisite service period     3 years  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Historical volatility period 3 years   3 years  
Risk-free interest rate     0.70%  
Expected volatility rate     35.00%  
Market Condition Award [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Granted, Weighted average grant-date fair value (in dollars per share)     $ 20.41  
Performance Condition Award [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Granted, Weighted average grant-date fair value (in dollars per share)     $ 18.39  
Time-Based Awards [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Number of additional outstanding shares issued (in shares)     1,441,373  
Director [Member] | Time-Based Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Vested (in shares)     353,023  
Director [Member] | Time-Based Awards [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Requisite service period   6 months    
Director [Member] | Time-Based Awards [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Requisite service period     12 months