Stock-Based Incentive Plan - Summary of Nonvested Stock Options (Details) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Nonvested Stock Options, Beginning balance	352,142
Nonvested Stock Options, Granted	193,778
Nonvested Stock Options, Vested	(156,024)
Nonvested Stock Options, Forfeited	(12,537)
Nonvested Stock Options, Ending balance	377,359
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Beginning balance	$ 6.47
Weighted Average Grant Date Fair Value, Granted	6.46	$ 6.72
Weighted Average Grant Date Fair Value, Vested	6.45
Weighted Average Grant Date Fair Value, Forfeited	6.48
Weighted Average Grant Date Fair Value, Ending balance	$ 6.48