STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2013

STOCK-BASED COMPENSATION [Abstract]

Costs Related to Stock Compensation Plans

	Three Months ended June, 30,						Six Months ended June, 30,
	2013			2012			2013			2012
Cost of revenues		$	1,079		$	884		$	1,858		$	1,450
Selling, general and administrative expenses			2,771			889			4,568			1,873
Total		$	3,850		$	1,773		$	6,426		$	3,323

Stock Option Activity

Stock option activity under the Company’s plans is set forth below:

	Number of Options			Weighted Average		Aggregate Intrinsic Value
Options outstanding at December 31, 2012		6,296,709		$	7.51	$	66,682
Options granted		1,865,000			23.03		7,740
Options exercised		(1,502,294	)		3.90		(34,973	)
Options forfeited/cancelled		(49,043	)		14.67		(614	)
Options outstanding at June 30, 2013		6,610,372		$	12.66	$	95,983
Options vested and exercisable at June 30, 2013		2,681,891		$	5.79	$	57,366
Options expected to vest		3,613,916		$	17.17	$	36,175

Restricted Stock Activity

	Number of Shares			Weighted Average Grant Date Fair Value Per Share
Unvested restricted stock outstanding at January 1, 2013		659,872		$	17.92
Restricted stock granted		14,041			23.20
Restricted stock vested		(172,987	)		(16.71	)
Unvested restricted stock outstanding at June 30, 2013		500,926		$	18.48