STOCK BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense Resulting from Stock Option Awards, Restricted stock units ("RSU") and ESPP

The following table presents the total stock-based compensation expense resulting from stock option awards, restricted stock units (“RSUs”), and the ESPP included in the Condensed Consolidated Statements of Income:

In thousands
	Three Months Ended March 31,
	2013		2012
Cost of revenues – stock option plan	$	40	$	38
Selling, general and administrative – stock option plan	3,530		3,480
Selling, general and administrative – RSUs	195		303
Selling, general and administrative – ESPP	282		264
Total pre-tax expense	$	4,047	$	4,085

Tax Benefits Related to Stock Compensation

The following table sets forth the tax benefits related to stock compensation:

In thousands
	Three Months Ended March 31,
	2013		2012
Tax benefit recognized in Statement of Income	$	1,130	$	1,119
Excess tax benefit realized	4,203		5,061

Assumptions used in Black-Scholes Model

The assumptions that we used in the Black-Scholes model are as follows:

	Three Months Ended March 31,
	2013			2012
Weighted average fair value at grant date	$	21.57		$	19.90
Expected term (in years)	6.00			6.00
Expected volatility	27.10		%	27.87		%
Expected dividend yield	—		%	—		%
Risk free interest rate	0.99		%	1.08		%

Stock Option Activity

Stock option activity for the three months ended March 31, 2013, was as follows:

	Number of Options		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
					(in years)
Outstanding at December 31, 2012	5,543,664		$	61.69
Granted	977,090		95.89
Exercised	(296,974	)	48.98
Canceled or expired	(48,286	)	74.18
Outstanding at March 31, 2013	6,175,494		$	67.61	7.08	$	238,175,533
Exercisable at March 31, 2013	3,224,428		$	54.82	5.75	$	165,599,626
Vested and expected to vest in the future at March 31, 2013	5,200,557		$	64.28	6.75	$	217,924,044

Intrinsic Value of Options Exercised

The total exercise intrinsic value represents the total pre-tax value (the difference between the sales price on that trading day in the quarter ended March 31, and the exercise price associated with the respective option).

In thousands
	Three Months Ended March 31,
	2013		2012
Total exercise intrinsic value of options exercised	$	14,562	$	16,582

Restricted Stock Units Activity

RSUs activity for the three months ended March 31, 2013 is summarized below. RSUs vest at the end of three or five years. Our 2008 and 2011 Plans include a share reserve related to RSUs granted at a 2-1 ratio.

	Number of Units		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
			(in years)
Outstanding at December 31, 2012	68,202
Granted	17,300
Released	(12,750	)
Forfeited	(500	)
Outstanding at March 31, 2013	72,252		3.40	$	7,671,717
Exercisable at March 31, 2013	—		0.00	$	—