• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Stock-Based Compensation - Information about Options Exercised (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award Options Activity [Abstract]      
Options exercised 30,000 60,000 120,000
Total intrinsic value of exercised options $ 1,319 $ 1,376 $ 4,551
Tax benefits realized $ 509 $ 501 $ 1,697