Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Employee Activity Performance Shares (Details)

v3.20.2
Share-Based Payments - Employee Activity Performance Shares (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 5,507 $ 5,910
Key Employee Performance Share Based Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Period of years over which performance is calculated 3 years  
Percentage of grant based on meeting EBITDA per share targets 50.00%  
Percentage of grant based on three year performance of Company's TSR as compared to TSR of peer group 50.00%  
Minimum percentage of shares attainable based on EBITDA per share targets 0.00%  
Maximum percentage of shares attainable based on EBITDA per share targets 200.00%  
Minimum percentage of shares attainable based on total shareholder return targets 0.00%  
Minimum percentage of peer group by which Company share price must outperform before incremental performance shares are issued 25.00%  
Maximum percentage of shares attainable based on total shareholder return targets 200.00%  
Percentage of Peer Group By Which Company Share Price Must Outperform Before Maximum Incremental Shares Are Issued 90.00%  
Expected Stock Price Volatility Rate 23.50% 23.40%
Weighted Average Risk Free Interest Rate 1.40% 2.50%
Continuing Operations [Member] | Key Employee Performance Share Based Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding and non-vested, beginning of period (in shares) 58  
Grants in Period 38  
Additional Shares Awarded Based on Performance, Shares Issued in Period 13  
Shares Vested in Period (33)  
Shares Forfeited in Period (11)  
Outstanding and non-vested, end of period (in shares) 65  
Outstanding and non-vested, weighted-average grant date fair value, beginning of period $ 62  
Grants in Period, Weighted Average Grant Date Fair Value 69  
Stock Issued During Period, Weighted Average Grant Date Fair Value 51  
Vested in Period, Weighed-average grant date fair value 51  
Forfeited in Period, Weighted Average Grant Date Fair Value 66  
Outstanding and non-vested, weighted-average grant date fair value, end of period $ 68  
Outstanding and non-vested, aggregate grant date fair value $ 4,425  
Share-based compensation expense 794 $ 682
Tax benefit related to share-based expense 202 174
Unrecognized share-based compensation, net of estimated forfeitures $ 2,837 2,299
Weighted average period over which unrecognized compensation will be recognized (years) 2 years 3 months 18 days  
Discontinued Operations [Member] | Key Employee Performance Share Based Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding and non-vested, beginning of period (in shares) 4  
Grants in Period 2  
Additional Shares Awarded Based on Performance, Shares Issued in Period 1  
Shares Vested in Period (2)  
Shares Forfeited in Period 0  
Outstanding and non-vested, end of period (in shares) 5  
Outstanding and non-vested, weighted-average grant date fair value, beginning of period $ 62  
Grants in Period, Weighted Average Grant Date Fair Value 69  
Stock Issued During Period, Weighted Average Grant Date Fair Value 51  
Vested in Period, Weighed-average grant date fair value 51  
Forfeited in Period, Weighted Average Grant Date Fair Value 0  
Outstanding and non-vested, weighted-average grant date fair value, end of period $ 66  
Outstanding and non-vested, aggregate grant date fair value $ 275  
Share-based compensation expense 48 35
Tax benefit related to share-based expense 12 9
Unrecognized share-based compensation, net of estimated forfeitures $ 165 $ 137
Weighted average period over which unrecognized compensation will be recognized (years) 2 years 1 month 6 days