Stock-Based Compensation - Non-Vested Stock Options Rollforward (Details)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Share-Based Compensation Arrangement by Share Based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Nonvested stock options, beginning of year, number of shares | shares	355,022
Nonvested stock options, vested, number of shares | shares	(225,961)
Nonvested stock options, forfeited, number of shares | shares	(7,279)
Nonvested stock options, end of year, number of shares | shares	121,782
Share-Based Compensation Arrangement by Share Based Payment Award, Options, Nonvested, Weighted-Average Grant Date Fair Value [Roll Forward]
Nonvested stock options, beginning of period, weighted-average grant date fair value | $ / shares	$ 3.62
Nonvested stock options, vested, weighted-average grant date fair value | $ / shares	3.73
Nonvested stock options, forfeited, weighted-average grant date fair value | $ / shares	3.48
Nonvested stock options, end of period, weighted-average grant date fair value | $ / shares	$ 3.48