Quarterly report pursuant to Section 13 or 15(d)

Stock Incentive Plans - Summary of ESPP Activity (Details)

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Stock Incentive Plans - Summary of ESPP Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Sep. 01, 2014
Mar. 03, 2014
Jun. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Payroll deductions used to purchase shares     $ 342
2014 ESPP Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Employee accumulated payroll deductions $ 343 $ 414  
Total shares purchased 18,551 30,358  
Payroll deductions used to purchase shares $ 342 $ 413  
Transfer to next offering period $ 1 $ 1  
FMV at enrollment date per share $ 21.69 $ 16.00  
FMV at purchase date per share 33.62 21.69  
Purchase price per share $ 18.44 $ 13.60