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Stock-Based Compensation Restricted Stock Awards (Details) - 2015 Plan [Member]
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Restricted stock awards at December 31, 2014, in shares | shares 0
Granted, in shares | shares 46,750
Vested, in shares | shares 46,750
Forfeited, in shares | shares 0
Restricted stock awards at December 31, 2015, in shares | shares 0
Restricted stock awards at December 31, 2014, in dollars per share | $ / shares $ 0.00
Granted, in dollars per share | $ / shares 20.00
Vested, in dollars per share | $ / shares 20.00
Forfeited, in dollars per share | $ / shares 0.00
Restricted stock awards at December 31, 2015, in dollars per share | $ / shares $ 0.00