XML 41 R30.htm IDEA: XBRL DOCUMENT v3.5.0.2
Equity Plans (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Apr. 27, 2016
$ / shares
shares
Jan. 26, 2016
$ / shares
shares
Jan. 04, 2016
vesting_installment
$ / shares
shares
Jun. 30, 2016
USD ($)
shares
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
shares
Jun. 30, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation costs charged to income:       $ 379 $ 362 $ 852 $ 761
Excess tax benefits realized from stock issuance:       94 108 202 634
Proceeds from ESPP and similar instruments:       $ 0 0 $ 451 433
Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Remaining shares available for issuance under the Incentive Plan (shares) | shares       993,954   993,954  
Shares issuable upon exercise of Incentive Plan awards (shares) | shares           230,182  
Employee Stock Purchase Plan (ESPP)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation costs charged to income:       $ 0 0 $ 79 76
Proceeds from ESPP and similar instruments:       0 0 451 433
Unrecognized compensation costs       $ 15   $ 15  
Purchase price of common stock under ESPP (percent)           85.00%  
Maximum percentage of base compensation employees can designate for stock purchases under ESPP (percent)       10.00%   10.00%  
Plan expense       $ 47 43 $ 87 82
Restricted stock and deferred restricted stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation costs charged to income:       379 362 773 685
Excess tax benefits realized from stock issuance:       94 $ 108 202 $ 634
Unrecognized compensation costs       $ 1,653   $ 1,653  
Recognition period for unrecognized compensation cost           1 year 1 month 6 days  
Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of equity instruments granted (shares) | shares     17,835        
Number of equal successive installments for vesting of stock awards (vesting installments) | vesting_installment     3        
Grant date fair value of equity instruments granted (usd per share) | $ / shares     $ 27.02        
Common Stock | Employee Stock Purchase Plan (ESPP)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized for issuance under the plan (shares) | shares       400,000   400,000  
Officer [Member] | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of equity instruments granted (shares) | shares   12,473          
Grant date fair value of equity instruments granted (usd per share) | $ / shares   $ 29.46          
Officer [Member] | Minimum | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Target vesting percentage   0.00%          
Officer [Member] | Maximum | Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Target vesting percentage   150.00%          
Director [Member] | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of equity instruments granted (shares) | shares 7,656            
Grant date fair value of equity instruments granted (usd per share) | $ / shares $ 35.79