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Share-Based Payment Arrangements (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended
Apr. 01, 2016
Mar. 31, 2016
May. 29, 2015
Apr. 02, 2015
Mar. 31, 2015
Apr. 10, 2013
Jul. 27, 2012
Mar. 31, 2016
Mar. 31, 2015
Jun. 30, 2013
Sep. 30, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Other than options, granted       8,616                    
Stock options, granted                          
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               539,240            
Number of non-qualified stock options to purchase shares of common stock outstanding               304,157            
Number of restricted stock units to receive shares of common stock               177,755            
Long Term Incentive Plan 2005 [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] | 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] | 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] | 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                      
Number of restricted stock units to receive shares of common stock               149,196            
Stock options, granted               0            
Incentive Stock Options 2009 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Incentive stock options termination period               7 years            
Share-based payment, award vesting period               10 years            
Incentive Stock Options 2010 [Member] | 25,000 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Incentive stock options termination period               10 years            
Share-based payment, award vesting period               3 years            
Number of options vested or expected to vest   25,000           25,000            
Non Qualified Stock Options [Member] | Long Term Incentive Plan 2005 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Percentage of options vested or expected to vest   100.00%           100.00%            
Incentive stock options termination period               10 years            
Incentive Non Qualified Stock Options 2009 [Member] | 200,000 Grant [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Incentive stock options termination period               10 years            
Share-based payment, award vesting period               7 years            
Number of options vested or expected to vest   200,000           200,000            
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 2005 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Restricted stock or unit expense               $ 101 $ 332          
Other than options, granted           122,823 129,463     175,983      
Other than options, forfeited               71,460   9,280        
Vested   7,144     8,616     7,144            
Other than options, grant date fair value                       $ 11.10 $ 9.66 $ 9.20
Income tax benefit of share-based payments recognized in income               $ 35 $ 116          
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, granted     103,351                      
Restricted Stock Units (RSUs) [Member] | 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   $ 700           700            
Compensation costs expected to be recognized during remainder of the fiscal period   300           300            
Compensation costs expected to be recognized during next fiscal year   300           300            
Compensation costs expected to be recognized in second future fiscal year   $ 100           $ 100            
Subsequent Event [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Other than options, granted 7,144