XML 62 R51.htm IDEA: XBRL DOCUMENT v3.10.0.1
Share-Based Payment Arrangements (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock options, Granted     0 0      
Long Term Incentive Plan 2005 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of incentive stock options to purchase shares of common stock outstanding     1,074        
Number of non-qualified stock options to purchase shares of common stock outstanding     244,157        
Long Term Incentive Plan 2005 [Member] | Option Issued Prior to 2009 [Member] | Share-based Compensation Award, Tranche One [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of options vested or expected to vest 10.00%   10.00%        
Long Term Incentive Plan 2005 [Member] | Option Issued Prior to 2009 [Member] | Share-based Compensation Award, Tranche Two [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of options vested or expected to vest 20.00%   20.00%        
Long Term Incentive Plan 2005 [Member] | Option Issued Prior to 2009 [Member] | Share-based Compensation Award, Tranche Three [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of options vested or expected to vest 30.00%   30.00%        
Long Term Incentive Plan 2005 [Member] | Option Issued Prior to 2009 [Member] | Share-based Compensation Award, Tranche Four [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of options vested or expected to vest 40.00%   40.00%        
Long Term Incentive Plan 2005 [Member] | Minimum [Member] | Option Issued Prior to 2009 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Incentive stock options termination period     5 years        
Long Term Incentive Plan 2005 [Member] | Maximum [Member] | Option Issued Prior to 2009 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Incentive stock options termination period     10 years        
Long Term Incentive Plan 2015 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock compensation plan, number of shares authorized 2,000,000   2,000,000        
Number of restricted stock units to receive shares of common stock     508,345        
Stock options, Granted     0        
Long Term Incentive Plan 2005 and 2015 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Total unrecognized compensation cost related to non-vested share-based compensation arrangements $ 0   $ 0        
Incentive Stock Options 2009 [Member] | Long Term Incentive Plan 2005 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Incentive stock options termination period     10 years        
Share-based payment award vesting rights     vest in equal annual increments on each of the first seven anniversary dates        
Non Qualified Stock Options [Member] | Long Term Incentive Plan 2005 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage     100.00%        
Incentive stock options termination period     10 years        
Share-based payment, award vesting period     6 months        
Non Qualified Stock Options [Member] | Long Term Incentive Plan 2005 [Member] | 200,000 Grant [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Incentive stock options termination period     10 years        
Number of options vested or expected to vest 200,000   200,000        
Share-based payment award vesting rights     vests in equal annual increments on each of the first seven anniversary dates        
Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Total unrecognized compensation cost related to non-vested share-based compensation arrangements $ 2,400   $ 2,400        
Compensation cost related to unvested stock units expected to be recognized 1,900   1,900        
Compensation costs expected to be recognized during remainder of the fiscal period 200   200        
Compensation costs expected to be recognized during next fiscal year 800   800        
Compensation costs expected to be recognized in second future fiscal year 700   700        
Compensation costs expected to be recognized in third future fiscal year 200   $ 200        
Other than options, granted     144,059 138,712      
Other than options, forfeited     182,743 43,509      
Vested     8,198 5,998      
Allocated share-based compensation expense 36 $ 51 $ 37 $ 97      
Income tax benefit of share-based payments recognized in income $ 8 $ 18 $ 8 $ 34      
Restricted Stock Units (RSUs) [Member] | Minimum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of restricted stock units granted as result of meeting growth rates 50.00%   50.00%        
Restricted Stock Units (RSUs) [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percentage of restricted stock units granted as result of meeting growth rates 150.00%   150.00%        
Restricted Stock Units (RSUs) [Member] | Long Term Incentive Plan 2015 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Other than options, grant date fair value     $ 10.87   $ 10.20 $ 11.41 $ 11.10