Annual report pursuant to Section 13 and 15(d)

EQUITY AND EARNINGS PER SHARE - Assumptions (Details)

v3.19.1
EQUITY AND EARNINGS PER SHARE - Assumptions (Details) - USD ($)
$ in Thousands
Nov. 12, 2018
Apr. 10, 2018
Jan. 01, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected Volatility (as percent)   35.66% 39.73%
Expected Volatility, Minimum (as percent) 35.40%    
Expected Volatility, Maximum (as percent) 35.80%    
Expected Dividend Yield (as percent) 0.00% 0.00% 0.00%
Risk-Free Rate, Minimum (as percent) 3.09% 2.68% 2.16%
Risk-Free Rate, Maximum (as percent) 3.11% 2.82% 2.29%
Fair Value at Valuation Date $ 7,478 $ 3,558 $ 4,272
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected Remaining Term 6 years 2 years 8 months 12 days 3 years
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected Remaining Term 6 years 6 months 6 years 3 months 18 days 6 years 7 months 6 days