XML 56 R46.htm IDEA: XBRL DOCUMENT v3.10.0.1
STOCK AWARD PLANS, All Plans Options and Restricted Stock Award Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Stock Options [Member]    
Share based Compensation Plans Combined Disclosure [Abstract]    
Intrinsic value of stock options exercised $ 6,709 $ 1,585
Tax benefit from stock options exercised 1,912 597
Unrecognized compensation cost related to unvested awards $ 2,770  
Weighted average period of recognition in years 1 year 8 months 12 days  
Fair value of options vested $ 3,170 $ 2,511
Fair value of stock options granted (in dollars per share) $ 23.53 $ 20.72
Fair value of stock options granted $ 2,787 $ 2,616
Fair Value Assumptions [Abstract]    
Dividend yield 0.00% 0.00%
Average risk-free interest rate 2.70% 2.00%
Stock price volatility 27.00% 27.00%
Estimated option term 6 years 6 years
Restricted Stock [Member]    
Share based Compensation Plans Combined Disclosure [Abstract]    
Intrinsic value of restricted stock vesting $ 11,454 $ 7,046
Tax benefit from restricted stock vesting 3,264 2,654
Unrecognized compensation cost related to unvested awards $ 10,296  
Weighted average period of recognition in years 2 years 3 months 18 days  
Fair value of restricted stock vested $ 11,454 $ 7,046
RSUs [Member]    
Share based Compensation Plans Combined Disclosure [Abstract]    
Vesting (in shares) 0  
Unrecognized compensation cost related to unvested awards $ 6,227  
Weighted average period of recognition in years 4 years 1 month 6 days