Stock-Based Compensation - Schedule of Restricted Stock Activity (Details) - Restricted Stock	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock, beginning of year, number of shares | shares	317,055
Granted, number of shares | shares	140,246
Vested, number of shares | shares	(111,224)
Forfeited, number of shares | shares	(53,571)
Restricted stock, end of year, number of shares | shares	292,506
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Restricted stock, beginning of year, weighted-average measurement date fair value (in dollars per share) | $ / shares	$ 26.22
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	41.46
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	26.14
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	27.96
Restricted stock, end of year, weighted-average measurement date fair value (in dollars per share) | $ / shares	$ 33.24