• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Stock-Based Compensation (Stock Options) - Additional Information (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 [Line Items]      
Exercise of common stock options, shares 30,000 60,000 120,000
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option contractual term 10 years    
Exercise of common stock options, shares     120,000
Options were net settled     30,000
Surrender of Shares     2,013
Recognized compensation expenses $ 306 $ 0 $ 0
Deferred tax benefits recognized 78 0 $ 0
Unrecognized compensation expense related to nonvested stock options $ 941 $ 0  
Recognition of remaining compensation expense over a weighted-average period 3 years    
Stock Options [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options maximum vesting period 5 years