XML 74 R63.htm IDEA: XBRL DOCUMENT v3.20.2
Stock-Based Compensation (Summary Of Restricted Stock Transactions) (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted, Number of Share Units 6,088 4,594 223,495 4,165 5,099 134,257    
Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Nonvested share units at beginning of period, Number of Share Units            
Granted, Number of Share Units             13,228 0
Stock units vested and issued, Number of Share Units              
Nonvested share units at end of period, Number of Share Units 13,228           13,228  
Nonvested share units at beginning of period, Weighted Average Fair Value            
Granted, Weighted Average Fair Value             34.02  
Share units vested, Weighted Average Fair Value              
Nonvested share units at end of period, Weighted Average Fair Value $ 34.02           $ 34.02