Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2018

Stock Options Plan [Member]

Summary of Transactions of Company's Stock Option Plans

The following table summarizes the transactions of the Company’s stock option plans for the nine months ended September 30, 2018:

	Number of Options			Weighted Average Exercise Price		Weighted Average Grant-Date Fair Value
Outstanding at December 31, 2017		357,666		$	13.74	$	35.69
Granted - at discount		280,466		$	46.42	$	34.54
- at market value		18,850		$	68.20	$	16.23
Exercised		(91,362	)	$	12.47	$	27.04
Forfeited		(14,443	)	$	21.05	$	25.34
Outstanding at September 30, 2018		551,177		$	32.25	$	36.14

Stock Equivalent Units [Member]

Summarizes Transactions of SEUs

The following table summarizes the transactions of the Company’s SEUs for the nine months ended September 30, 2018:

	Number of SEUs			Weighted Average Exercise Price		Weighted Average Grant-Date Fair Value
Outstanding at December 31, 2017		400,342		$	3.10	$	46.65
Granted - at discount		115,229		$	2.36	$	57.16
- at market value		5,658		$	68.20	$	16.23
Exercised		(72,689	)	$	5.81	$	29.27
Forfeited		(16,554	)	$	1.40	$	37.14
Outstanding at September 30, 2018		431,986		$	3.36	$	52.35