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Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2016

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 March 31, 2016:

		Stock Options Outstanding
						Weighted Average				Aggregate				Weighted Average
						Exercise Price				Intrinsic				Remaining Contractual
		Shares				Per Share				Value				Term (Years)
Balance as of January 1, 2016			1,323			$	129.04
Granted			0				0.00
Exercised			(102	)			93.85			$	7,550
Forfeited/Expired			(325	)			98.39
Balance as of March 31, 2016			896			$	144.13
Exercisable as of March 31, 2016			169			$	132.20			$	8,019				8.3
Expected to vest as of March 31, 2016			727			$	146.90				26,673				8.5
Total			896			$	144.13			$	34,692				8.5

Range Of Exercise Prices

Stock options outstanding as of March 31, 2016 are comprised of the following range of exercise prices per share (in thousands, except per share data and years):

		Stock Options Outstanding at March 31, 2016
						Weighted Average				Weighted Average
						Exercise Price				Remaining Contractual
Range of Exercise Prices per Share		Shares				Per Share				Term (Years)
$117.85 - $120.00			32			$	118.66				8.1
$120.01 - $150.00			514			$	121.43				8.1
$150.01 - $180.00			220			$	167.17				8.9
$180.01 - $201.25			130			$	201.25				9.4
Total			896			$	144.13				8.5

Assumptions Used in Black-Scholes Pricing Model

The weighted average grant date fair value of stock option awards using the Black-Scholes pricing model was $68.19 for each share subject to a stock option granted during the three months ended March 31, 2015, based on the following assumptions:

		Three months ended
		March 31,
		2015
Expected term of options in years			6.3
Expected volatility			40.2	%
Risk-free interest rate			1.5	%
Expected dividend yield			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)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- 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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