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Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity (in thousands, except per share data and years) for the three months ended June 30, 2015:

		Stock Options Outstanding
		Shares				Weighted Average Exercise Price Per Share				Aggregate Intrinsic Value				Weighted Average Remaining Contractual Term (Years)
Balance as of April 1, 2015			1,335			$	119.39
Granted			40				177.39
Exercised			(39	)			102.52			$	3,049
Forfeited/Expired			(30	)			165.01
Balance as of June 30, 2015			1,306			$	120.62
Exercisable as of June 30, 2015			226			$	108.75			$	13,875				8.5
Expected to vest as of June 30, 2015			1,030			$	124.57			$	47,169				8.7
Total			1,256			$	121.72			$	61,044				8.6

Range Of Exercise Prices

Stock options outstanding as of June 30, 2015 are comprised of the following range of exercise prices per share (in thousands, except per share data and years):

		Stock Options Outstanding at June 30, 2015
Range of Exercise Prices per Share		Shares				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term (Years)
$  92.84 - $120.00			507			$	94.49				7.1
$120.01 - $150.00			514			$	121.43				8.8
$150.01 - $178.80			285			$	165.66				9.6
Total			1,306			$	120.62				8.3

Assumptions Used in Black-Scholes Option-Pricing Model

The weighted average grant date fair value of stock option awards using the Black-Scholes pricing model was $73.23 and $54.01 for each share subject to a stock option granted during the three months ended June 30, 2015 and 2014, respectively, based on the following assumptions:

		Three months ended June 30,
		2015				2014
Expected term of options in years			6.3				6.3
Expected volatility			39.2 - 39.3	%			42.4 - 42.5	%
Risk-free interest rate			1.9	%			2.2 - 2.3	%
Expected dividend yield			0.0	%			0.0	%

X

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(1)



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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (f)(2)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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