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Share-based Compensation - Restricted Stock Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Jun. 30, 2015
Sep. 30, 2013
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Allocated Share-based Compensation Expense $ 0 $ 100 $ 100    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]          
Shares Awarded, Beginning balance     47,082    
Restricted stock granted 9,638        
Shares Awarded, Exercised/Released (21,429)        
Shares Awarded, Cancelled/Forfeited (8,619)        
Shares Awarded, Ending balance 26,672   26,672 47,082  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]          
Weighted Average Grant Date Fair Value, Beginning balance     $ 16.48    
Weighted Average Grant Date Fair Value, Granted     29.91    
Weighted Average Grant Date Fair Value, Exercised/Released $ 13.00        
Weighted Average Grant Date Fair Value, Cancelled/Forfeited 13.06        
Weighted Average Grant Date Fair Value, Ending balance $ 25.23   $ 25.23 $ 16.48  
Share-based Compensation Arrangement by Share-based Payment Award, Equity instruments Other Than Options, Grants in Period, Weighted Average Remaining Contractual Term     3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value [Roll Forward]          
Aggregate Intrinsic Value, Beginning Balance     $ 1,106    
Aggregate Intrinsic Value, Exercised/Released $ 657        
Aggregate Intrinsic Value, Granted 288        
Aggregate Intrinsic Value, Cancelled/Forfeited 0        
Aggregate Intrinsic Value, Ending Balance $ 861   $ 861 $ 1,106  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]          
Weighted Average Remaining Life, Beginning balance     2 years 2 months 6 days 1 year 2 months 12 days  
Weighted Average Remaining Life, Ending balance     2 years 2 months 6 days 1 year 2 months 12 days  
Vested and Expected to Vest, Outstanding, Number 24,612   24,612    
Vested and Expected to Vest, Weighted Average Exercise Price $ 25.11   $ 25.11    
Vested and Expected to Vest, Weighted Average Remaining Life     2 years 2 months 6 days    
Vested and Expected to Vest, Aggregate Intrinsic Value $ 794   $ 794    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 4 months 24 days        
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost related to restricted stock $ 600   $ 600   $ 500