Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes the activity of stock options for the year ended December 31, 2017 for employees:

	Options			Weighted Average Exercise price		Weighted Average Remaining Contractual Life (years)		Aggregate Intrinsic Value (000’s)
Outstanding at December 31, 2016		427,370		$	32.15
Granted		56,150
Exercised		(141,500	)
Forfeited		(7,020	)
Outstanding at December 31, 2017		335,000		$	34.75		5.0	$	10,400
Exercisable at December 31, 2017		25,280		$	34.38		4.6	$	920

Summary of Weighted Average Assumptions Used In Valuing Options

The following table summarizes the weighted average assumptions used in valuing options for the years ended December 31, 2017, 2016 and 2015:

	2017			2016			2015
Risk free interest rate		1.89	%		1.63	%		1.54	%
Expected life in years		4.5			4.5			4.5
Expected volatility		36.90	%		41.42	%		40.82	%
Dividend rate		—			—			—

Summary of Unvested Option

The following table summarizes the status of the Company’s unvested options as of December 31, 2017 and changes during the year ended December 31, 2017:

	Options			Weighted Average Grant-date Fair  Value
Unvested at December 31, 2016		402,770		$	11.88
Granted		56,150			15.49
Vested		(142,180	)		12.26
Forfeited		(7,020	)		11.15
Unvested at December 31, 2017		309,720		$	12.38

Summary of Restricted Stock Activity

The following table summarizes restricted stock activity during the year ended December 31, 2017:

	Shares			Weighted Average Grant-date Fair  Value
Restricted Stock at December 31, 2016		66,168		$	21.91
Granted		33,800			49.12
Vested		(38,350	)		13.04
Forfeited		(3,761	)		46.35
Restricted Stock at December 31, 2017		57,857		$	42.10