STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2016

STOCK-BASED COMPENSATION

Schedule of weighted-average assumptions used to estimate the fair value of options granted

	2016	2015	2014
Dividend yield	0.0%	0.0%	0.0%
Expected volatility	36.2%	37.1%	41.4%
Risk-free interest rate	1.57%	1.57%	1.55%
Expected term	6.3 Years	5.8 Years	5.8 Years

Summary of Company's activities with respect to its stock option plans

Options	Number of Shares (In thousands)	Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value
Outstanding at January 1, 2016	19,770	$	16.95	5.6	$	646,497
Granted 01/01/16 - 03/31/16	2,883	$	44.02
Granted 04/01/16 - 06/30/16	657	$	46.18
Granted 07/01/16 - 09/30/16	42	$	52.60
Granted 10/01/16 - 12/31/16	1,510	$	43.87
Exercised	(1,887)	$	8.72
Cancelled or forfeited	(332)	$	33.65
Outstanding at December 31, 2016	22,643	$	23.55	5.8	$	474,739
Vested and expected to vest in the
future at December 31, 2016	21,269	$	22.40	5.6	$	470,017
Exercisable at December 31, 2016	12,231	$	11.26	3.6	$	404,982

Summary of information about stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at December 31, 2016:

			Options Outstanding			Options Exercisable
Range of Exercise Prices ($)			Number Outstanding (In Thousands)	Weighted Average Remaining Contractual Term (Years)	Weighted Average Exercise Price ($)	Number Exercisable (In Thousands)	Weighted Average Exercise Price ($)
$4.51	-	$4.51	52	1.9	$ 4.51	52	$ 4.51
$5.29	-	$5.29	3,945	1.4	$ 5.29	3,945	$ 5.29
$5.61	-	$5.61	55	2.1	$ 5.61	55	$ 5.61
$5.94	-	$5.94	3,427	2.9	$ 5.94	3,427	$ 5.94
$6.02	-	$15.71	2,286	4.9	$ 12.57	1,440	$ 10.73
$15.88	-	$22.26	2,268	6.2	$ 18.60	1,666	$ 18.43
$23.00	-	$36.05	2,289	7.2	$ 23.83	1,075	$ 23.45
$37.10	-	$43.64	2,218	9.2	$ 41.64	162	$ 37.42
$43.99	-	$43.99	2,774	9.1	$ 43.99	-	$ 0.00
$44.73	-	$53.24	3,329	8.5	$ 45.53	409	$ 45.15
			22,643	5.8	$ 23.55	12,231	$ 11.26

Summary of Company's activities with respect to non-vested restricted stock units

	Number of Shares (in thousands)	Weighted Average Grant-Date Fair Value
Non-vested at January 1, 2016	535	$	33.19
Granted 01/01/16- 03/31/16	246	$	43.99
Granted 04/01/16- 06/30/16	36	$	49.65
Granted 07/01/16- 09/30/16	-	$	-
Granted 10/01/16- 12/31/16	-	$	-
Vested	(256)	$	31.50
Forfeited/cancelled	(5)	$	19.42
Non-vested at December 31, 2016	556	$	39.95

Schedule of employee and non-employee share-based compensation expense

	2016		2015		2014
Operating expenses	$	45,848	$	32,719	$	28,552
Total employee and non-employee share-based compensation expense included in income, before income tax	45,848		32,719		28,552
Less: Amount of income tax benefit recognized in earnings	(34,909)		(9,058)		(2,932)
Amount charged against net income	$	10,939	$	23,661	$	25,620