Stock-Based Compensation - Summary of Stock Option Activity (Details) - $ / shares		9 Months Ended	12 Months Ended
	Aug. 04, 2017	Sep. 30, 2017	Dec. 31, 2016
Number of Shares
Outstanding at beginning of period (in shares)		472,973	276,219
Granted (in shares)	212,468	10,556	210,448
Exercised (in shares)		(273,081)	(3,138)
Forfeited (in shares)		0	(10,556)
Outstanding at end of period (in shares)		210,448	472,973
Nonvested at end of period (in shares)		167,271	199,892
Exercisable at end of period (in shares)		43,177	273,081
Weighted Average Exercise Price
Outstanding at beginning of period (in usd per share)		$ 10.96	$ 9.43
Granted (in usd per share)	$ 9.4323	17.30	13.04
Exercised (in usd per share)		9.43	9.43
Forfeited (in usd per share)		0.00	13.04
Outstanding at end of period (in usd per share)		13.27	10.96
Nonvested at end of period (in usd per share)		13.32	13.05
Exercisable at end of period (in usd per share)		13.05	9.43
Weighted-average fair value of awards granted (in usd per share)		$ 3.71	$ 2.12