XML 133 R118.htm IDEA: XBRL DOCUMENT v3.19.1
Stock-Based Compensation - Stock Options Activity (Details)
 12 Months Ended
Dec. 31, 2018
$ / shares
shares
Number of Shares  
Outstanding at beginning of period (in shares) | shares 143,445
Granted (in shares) | shares 22,384
Forfeited (in shares) | shares 0
Exercised (in shares) | shares (17,764)
Outstanding at end of period (in shares) | shares 148,065
Weighted Average Exercise Price  
Outstanding at beginning of period (in USD per share) | $ / shares $ 26.79
Granted (in USD per share) | $ / shares 37.06
Forfeited (in USD per share) | $ / shares 0.00
Exercised (in USD per share) | $ / shares 21.82
Outstanding at end of period (in USD per share) | $ / shares $ 28.94
Weighted average remaining contractual life, Outstanding at end of period 6 years 33 days