STOCK BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense Resulting from Stock Option Awards, RSUs, PSUs and ESPP

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

In thousands
	Three Months June 30,				Six Months June 30,
	2017		2016		2017		2016
Cost of revenues - stock option plan	$	13	$	12	$	26	$	27
Selling, general and administrative - stock option plan		3,809		4,585		7,889		9,337
Selling, general and administrative - RSUs		1,546		399		2,947		958
Selling, general and administrative - PSUs		188		—		376		—
Selling, general and administrative - ESPP		325		456		642		1,235
Total pre-tax expense	$	5,881	$	5,452	$	11,880	$	11,557

Stock Option Activity

Stock option activity during the six months ended June 30, 2017, is summarized as follows:

	Number of Options			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Life		Total Aggregate Intrinsic Value
						(in years)		(in thousands)
Outstanding as of January 1, 2017		5,468,732		$	96.90
Granted		436,784			83.25
Exercised		(106,024	)		50.23
Forfeited		(80,104	)		112.48
Cancelled or expired		(92,591	)		98.99
Outstanding as of June 30, 2017		5,626,797		$	96.47		5.06	$	21,647
Exercisable as of June 30, 2017		3,586,680		$	89.37		4.36	$	21,644

Intrinsic Value of Options Exercised

The following table sets forth the intrinsic value of options exercised for the three and six months ended June 30:

In thousands
	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Total intrinsic value of options exercised	$	352	$	7,021	$	3,260	$	20,250

Assumptions Used in Black-Scholes Option Pricing Model

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
Stock options granted (shares)		11,185			31,538			436,784			1,040,107
Weighted average fair value at grant date	$	19.97		$	19.69		$	19.54		$	20.17
Assumptions:
Expected term (in years)		4.83			4.80			4.82			4.77
Expected volatility		22.78	%		20.96	%		22.67	%		18.11	%
Expected dividend yield		—	%		—	%		—	%		—	%
Risk free interest rate		1.80	%		1.26	%		1.90	%		1.22	%

Summary of RSU Activity

A summary of our RSU activity during the six months ended June 30, 2017, is summarized as follows:

	Number of Units			Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Life	Total Aggregate Intrinsic Value
						(in years)	(in thousands)
Outstanding as of January 1, 2017		114,838		$	104.22
Granted		202,711			83.30
Vested and released		(34,079	)		93.86
Forfeited		(9,169	)		95.52
Outstanding as of June 30, 2017		274,301		$	90.33	2.38	$	20,936