STOCK BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2013

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

Shares Reserved for Issuance, Consisting both Shares Available for Option Grants and Shares Granted as Options

As of December 31, 2013, we reserved the following shares for issuance, consisting of both shares available for awards under the 2011 Plan, 2008 Plan, 2005 Plan, 2000 Plan, and 1997 Plan and shares issuable under outstanding stock option grants and restricted stock unit awards:

1996 Directors Plan shares	28,744
1997 Plan shares	3,384
2000 Plan shares	135,117
2005 Plan shares	1,843,929
2008 Plan shares	3,045,598
2011 Plan shares	3,000,000
Total shares reserved	8,056,772

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 Consolidated Statements of Income:

In thousands
	Years Ended December 31,
	2013		2012		2011
Cost of revenues - stock option plan	$	120	$	136	$	121
Selling, general and administrative - stock option plan	15,212		13,630		13,428
Selling, general and administrative - RSUs	1,116		1,474		811
Selling, general and administrative - ESPP	1,009		1,099		1,007
Total pre-tax expense	$	17,457	$	16,339	$	15,367

Tax Benefits Related to Stock Compensation

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

In thousands
	Years Ended December 31,
	2013		2012		2011
Tax benefit recognized in Statement of Income	$	4,518	$	5,818	$	6,091
Excess tax benefit realized	17,153		30,161		17,410

Stock Option Activity

Stock option activity for the year ended December 31, 2013, is summarized as follows:

	Number of Options		Weighted Average Exercise Price per Share
Outstanding at beginning of year	5,543,664		$	61.69
Granted	1,057,630		97.09
Exercised	(923,688	)	48.17
Forfeited	(135,371	)	79.22
Canceled or expired	(1,753	)	20.60
Outstanding at end of year	5,540,482		$	70.29
Exercisable at end of year	2,739,717		$	57.35
Vested and expected to vest	4,965,902		$	68.16

Intrinsic Value and Fair 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 year ended December 31, 2013 and the exercise price associated with the respective option).

In thousands
	2013		2012		2011
Total intrinsic value of options exercised	$	55,757	$	97,816	$	52,939

Information Related to Outstanding and Exercisable Options

The following table sets forth the information related to outstanding and exercisable options for the years ended December 31:

	2013		2012		2011
Weighted average remaining contractual life of outstanding options (in years)	6.60		6.70		6.50
Total aggregate intrinsic value of outstanding options (in thousands)	$	254,200	$	175,200	$	184,300
Weighted average remaining contractual life of exercisable options (in years)	5.30		5.50		5.30
Total aggregate intrinsic value of exercisable options (in thousands)	$	161,100	$	114,500	$	128,900

Options Outstanding and Exercisable by Price Range

Options outstanding and exercisable as of December 31, 2013 by price range are presented below:

	Options Outstanding				Options Exercisable
Range of Exercise Price	Shares	Outstanding Average Remaining Life in Years	Weighted Average Exercise Price		Shares	Weighted Average Exercise Price
$22.110 - $38.565	573,918	2.46	$	33.46	565,918	$	33.50
$38.905 - $49.760	602,910	4.98	46.79		436,174	46.74
$50.020 - $51.550	744,346	6.09	51.53		401,501	51.52
$51.750 - $58.820	563,083	4.57	54.44		550,667	54.43
$58.900 - $84.910	176,926	7.32	77.06		119,462	78.54
$85.000 - $85.000	768,426	7.11	85.00		321,318	85.00
$85.020 - $86.020	13,850	8.11	85.50		2,450	85.55
$86.240 - $86.240	862,195	8.12	86.24		187,983	86.24
$86.830 - $95.030	211,946	8.08	90.48		115,370	88.85
$95.870 - $119.190	1,022,882	9.16	97.14		38,874	96.56
$22.110 - $119.190	5,540,482	6.58	$	70.29	2,739,717	$	57.35

Assumptions used in Black-Scholes Model

The estimated fair value of stock options at the time of the grant using the Black-Scholes model option pricing model was as follows:

	Years Ended December 31,
	2013			2012			2011
Stock options granted (shares)	1,057,630			1,142,205			1,050,226
Weighted average fair value at grant date	$	22.02		$	20.14		$	21.07
Expected term (in years)	5.81			6.00			5.75
Expected volatility	27.03		%	27.87		%	27.42		%
Expected dividend yield	—		%	—		%	—		%
Risk free interest rate	1.00		%	1.05		%	2.21		%

Intrinsic Value and Fair Value of RSUs

The following table sets forth the information related to RSUs for the years ended December 31:

	2013		2012		2011
Total aggregate intrinsic value of outstanding units (in thousands)	$	8,185	$	6,362	$	2,707
Per share fair value of units granted	96.40		86.24		85.00

Restricted Stock Units Activity

A summary of the status of our non-vested RSUs and changes during the year 2013 are as follows:

	Number of Shares		Weighted Average Grant Date Fair Value
Non-vested at beginning of year	68,202		$	79.45
Granted	17,900		96.40
Vested and released	(12,750	)	51.65
Forfeited	(2,895	)	90.75
Non-vested at end of year	70,457		$	88.32

As of December 31, 2013, there was $3.6 million of total unrecognized compensation expense related to RSUs, which is expected to be recognized over a weighted average period of 2.62 years. The fair value of units that vested during the years ended December 31, 2013 and 2012 was $1.2 million and $0.4 million, respectively. No units vested in 2011.