Annual report pursuant to Section 13 and 15(d)

STOCK???BASED COMPENSATION - Summary Of Performance Shares Activity (Details)

v3.10.0.1
STOCK‑BASED COMPENSATION - Summary Of Performance Shares Activity (Details) - Performance stock units
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]  
Outstanding at Beginning of Period (in shares) 169,635
Target Shares Granted (in shares) 178,975
Target Shares Vested (in shares) 0
Target Shares Forfeited (in shares) 0
Outstanding at End of Period (in shares) 348,610
Weighted Average Grant Date Fair Value per Share (in dollars per share) | $ / shares $ 19.34
2016  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]  
Outstanding at Beginning of Period (in shares) 169,635
Target Shares Granted (in shares) 0
Target Shares Vested (in shares) 0
Target Shares Forfeited (in shares) 0
Outstanding at End of Period (in shares) 169,635
Weighted Average Grant Date Fair Value per Share (in dollars per share) | $ / shares $ 10.73
2017  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]  
Outstanding at Beginning of Period (in shares) 0
Target Shares Granted (in shares) 178,975
Target Shares Vested (in shares) 0
Target Shares Forfeited (in shares) 0
Outstanding at End of Period (in shares) 178,975
Weighted Average Grant Date Fair Value per Share (in dollars per share) | $ / shares $ 27.51