Stock-Based Incentive Plan - Summary of Nonvested Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Nonvested Stock Options, Beginning balance	308,940
Nonvested Stock Options, Granted	189,797
Nonvested Stock Options, Vested	(130,595)
Nonvested Stock Options, Forfeited	(16,000)
Nonvested Stock Options, Ending balance	352,142	308,940
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	$ 6.15
Weighted Average Grant Date Fair Value, Granted	6.72	$ 6.23	$ 6.07
Weighted Average Grant Date Fair Value, Vested	6.06
Weighted Average Grant Date Fair Value, Forfeited	6.47
Weighted Average Grant Date Fair Value, Ending balance	$ 6.47	$ 6.15