Stock-Based Compensation - Summary of Common Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Number of Shares
Options outstanding at December 31, 2014 (shares)	846,874
Options granted (shares)	0
Options forfeited (shares)	0
Options outstanding at September 30, 2015 (shares)	846,874
Options exercisable at September 30, 2015 (shares)	24,717
Weighted-Average Exercise Price per share
Options outstanding at December 31, 2014 (in dollars per share) | $ / shares	$ 11.00
Options granted (in dollars per share) | $ / shares	0.00
Options forfeited (in dollars per share) | $ / shares	0.00
Options outstanding at September 30, 2015 (in dollars per share) | $ / shares	11.00
Options exercisable at September 30, 2015 (in dollars per share) | $ / shares	$ 11.00