XML 108 R94.htm IDEA: XBRL DOCUMENT v3.20.4
STOCK-BASED COMPENSATION PLANS (Restricted Stock and Restricted Stock Units Activity) (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Weighted Average Grant-Date Fair Value (in dollars per share):      
Document Period End Date   Dec. 31, 2020  
Restricted Stock and Restricted Stock Units [Member]      
Unvested Shares: [Roll Forward]      
Unvested, Beginning Balance 302,077 382,872 318,097
Granted 161,598 384,807 227,262
Vested (103,363) (146,919) (120,675)
Forfeited (42,215) (42,624) (41,812)
Unvested, Ending Balance   578,136 382,872
Weighted Average Grant-Date Fair Value (in dollars per share):      
Unvested, Beginning Balance $ 48.97 $ 54.39 $ 52.43
Granted 55.04 33.49 53.50
Vested 48.60 55.18 50.23
Forfeited $ 47.05 47.90 46.25
Unvested, Ending Balance   $ 40.76 $ 54.39