Incentive Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

A summary of stock option activity as of and for the year ended December 31, 2017 is presented below:

	Non-vested stock					Stock options
	options outstanding					outstanding
				Weighted-					Weighted-		Weighted-
				average					average		average
	Number			grant-date		Number			exercise		contractual
	of shares			fair value		of shares			price		term (years)
Outstanding at December 31, 2016		327,275		$	8.05		934,600		$	23.62
Stock options granted		99,900			9.60		99,900			19.84
Stock options exercised		-			-		(22,125	)		14.77
Stock options vested		(127,700	)		9.73		-			-
Stock options forfeited		(52,275	)		7.44		(128,325	)		22.82
Outstanding at December 31, 2017		247,200		$	7.94		884,050		$	23.53		5.8
Exercisable at December 31, 2017							636,850		$	26.56		4.5

Schedule of Assumptions Used to Determine Fair Value of Stock Options Granted

The assumptions used to determine the fair value of stock options granted are detailed in the table below:

	2017			2016			2015
Risk-free interest rate	1.92% to 2.29%			1.42% to 2.39%			1.77% to 2.19%
Dividend yield		0.0	%		0.0	%		0.0	%
Expected market price volatility	45% to 53%			51% to 53%			49% to 55%
Weighted-average expected market price volatility		47.4	%		51.0	%		52.6	%
Expected term	5.6 to 7.5 years			5.6 to 7.5 years			5.6 to 7.5 years

Summary of Restricted Stock Activity

A summary of restricted stock activity for the years ended December 31, 2017 and 2016 is presented below:

					Weighted-
					average
	Number				grant-date
	of shares				fair value
Balance, December 31, 2015		-		$		-
Restricted stock granted		95,000				14.75
Restricted stock forfeited		-				-
Balance, December 31, 2016		95,000				14.75
Restricted stock granted in May		6,780				18.00
Restricted stock granted in November		7,500				20.29
Restricted stock forfeited		(27,000	)			14.96
Balance, December 31, 2017		82,280		$		15.45