STOCKHOLDERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2018

The Company’s results for the three months ended March 31, 2018 and 2017 reflected the following stock-based compensation cost, and such compensation cost had the following effects on net earnings:

	Increase/(Decrease) for the Three Months Ended March 31,
	2018			2017
Cost of sales	$	245		$	311
Operating expenses		1,548			1,530
Net earnings		(1,378	)		(1,167	)

Summary of Stock Option Activity

Option activity for the three months ended March 31, 2018 and 2017 is summarized below:

For the three months ended March 31, 2018	Shares (000s)			Weighted Average Exercise Price		Aggregate Intrinsic Value		Weighted Average Remaining Contractual Term
Outstanding as of December 31, 2017		946		$	55.44	$	24,714
Granted		148			74.57
Exercised		(39	)		32.83
Forfeited		(1	)		73.49
Cancelled		(1	)		25.39
Outstanding as of March 31, 2018		1,053		$	58.98	$	24,680		6.6
Exercisable as of March 31, 2018		637		$	48.54	$	21,306		5.3

For the three months ended March 31, 2017	Shares (000s)			Weighted Average Exercise Price		Aggregate Intrinsic Value		Weighted Average Remaining Contractual Term
Outstanding as of December 31, 2016		1,066		$	45.32	$	41,161
Granted		216			85.38
Exercised		(108	)		36.57
Forfeited		(7	)		57.20
Cancelled		(6	)		58.42
Outstanding as of March 31, 2017		1,161		$	53.46	$	34,272		6.9
Exercisable as of March 31, 2017		644		$	39.62	$	27,584		5.1

Other Information Pertaining to Stock Option Activity

Other information pertaining to option activity during the three months ended March 31, 2018 and 2017 was as follows:

	Three Months Ended March 31,
	2018			2017
Weighted-average fair value of options granted		$	18.62		$	23.27
Total intrinsic value of stock options exercised ($000s)		$	1,825		$	5,221

Non-vested Restricted Stock Activity

Non-vested restricted stock activity for the three months ended March 31, 2018 and 2017 is summarized below:

Three months ended March 31, 2018	Shares (000s)			Weighted Average Grant Date Fair Value
Non-vested balance as of December 31, 2017		66		$	65.66
Granted		36			74.57
Vested		(6	)		50.32
Forfeited		-			-
Non-vested balance as of March 31, 2018		96		$	70.10

Three months ended March 31, 2017	Shares (000s)			Weighted Average Grant Date Fair Value
Non-vested balance as of December 31, 2016		102		$	54.18
Granted		9			85.40
Vested		(14	)		40.98
Forfeited		-			-
Non-vested balance as of March 31, 2017		97		$	59.12

Non-vested Performance Share Activity

Non-vested performance share activity for the three months ended March 31, 2018 and 2017 is summarized below:

Three months ended March 31, 2018	Shares (000s)			Weighted Average Grant Date Fair Value
Non-vested balance as of December 31, 2017		39		$	72.62
Granted		32			71.27
Vested		(15	)		58.78
Forfeited		-			-
Non-vested balance as of March 31, 2018		56		$	75.47

Three months ended March 31, 2017	Shares (000s)		Weighted Average Grant Date Fair Value
Non-vested balance as of December 31, 2016		34	$	61.06
Granted		15		93.85
Vested		-		-
Forfeited		-		-
Non-vested balance as of March 31, 2017		49	$	71.34