Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation (Details)

v3.20.1
Share-Based Compensation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Jan. 13, 2020
shares
Jan. 01, 2020
USD ($)
Percentile_Rank
$ / shares
shares
Mar. 31, 2020
USD ($)
form
$ / shares
shares
PIUs      
Share-Based Compensation      
Number of forms of executive compensation | form     2
Performance-based PIU's      
Share-Based Compensation      
Stock awards granted (in shares or units)   176,758  
Aggregate grant date fair value | $   $ 2,900  
Aggregate grant date fair value (in dollars per share) | $ / shares   $ 16.36  
Award vesting period   3 years  
Shares canceled (in shares)     73,184
Potential earned PSUs payout for defined levels of performance under awards      
Earned PB-PIUs payout (as a percent of PB-PIUs granted) on 75th or greater percentile rank   100.00%  
Earned PB-PIUs payout (as a percent of PB-PIUs granted) on 50th percentile rank   50.00%  
Earned PB-PIUs payout (as a percent of PB-PIUs granted) on 25th percentile rank   25.00%  
Earned PB-PIUs granted on percentile rank below 25th (as a percent)   0.00%  
The number of percentile ranks to fall between to earn interpolated PB-PIUs between such percentile ranks, conditioned on the percentile rank exceeding 25% | Percentile_Rank   2  
Assumptions used to value stock awards      
Percent of award distribution rights   10.00%  
Award performance period   3 years  
Baseline value per common share (in dollars per share) | $ / shares   $ 29.38  
Expected volatility of common shares (as a percent)   18.00%  
Risk-free interest rate (as a percent)   1.65%  
Time-based PIU's      
Share-Based Compensation      
Stock awards granted (in shares or units)     67,081
Aggregate grant date fair value | $     $ 1,700
Aggregate grant date fair value (in dollars per share) | $ / shares     $ 25.34
Shares vested (in shares)     18,318
Weighted average fair value of shares vested (in dollars per share) | $ / shares     $ 25.81
Aggregate intrinsic value of awards upon vesting | $     $ 464
Award vesting period     3 years
Award annual vesting increments     33.33%
Shares canceled (in shares)     20,622
Restricted shares      
Share-Based Compensation      
Stock awards granted (in shares or units)     133,335
Aggregate grant date fair value | $     $ 3,400
Aggregate grant date fair value (in dollars per share) | $ / shares     $ 25.34
Shares vested (in shares)     132,703
Weighted average fair value of shares vested (in dollars per share) | $ / shares     $ 28.13
Aggregate intrinsic value of awards upon vesting | $     $ 3,400
2017 PSU Grants | Performance share units      
Share-Based Compensation      
Shares issued (in shares) 23,181    
Percentage of target 53.00%