XML 52 R38.htm IDEA: XBRL DOCUMENT v3.3.1.900

Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 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 periods indicated:

		Stock Options Outstanding
		Shares				Weighted Average Exercise Price Per Share				Aggregate Intrinsic Value				Weighted Average Remaining Contractual Term (Years)
Balance as of January 1, 2013			16			$	20.81
Granted			600				92.84
Exercised			(16	)			20.81			$	1,262
Forfeited/Expired			0				0
Balance as of December 31, 2013			600			$	92.84
Granted			745				125.46
Exercised			(9	)			92.84			$	653
Forfeited/Expired			(135	)			104.48
Balance as of December 31, 2014			1,201			$	111.77
Granted			380				178.93
Exercised			(91	)			105.25			$	6,367
Forfeited/Expired			(167	)			131.31
Balance as of December 31, 2015			1,323			$	129.04
Exercisable as of December 31, 2015			334			$	105.20			$	24,746				7.9
Expected to vest as of December 31, 2015			989			$	137.09				44,581				8.6
Total			1,323			$	129.04			$	69,327				8.4

Range Of Exercise Prices

Stock options outstanding as of December 31, 2015 are comprised of the following range of exercise prices per share (in thousands, except per share data and years):

		Stock Options Outstanding at December 31, 2015
Range of Exercise Prices per Share		Shares				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term (Years)
$92.84 - $120.00			432			$	94.78				7.7
$120.01 - $150.00			514			$	121.43				8.3
$150.01 - $180.00			247			$	166.91				9.1
$180.01 - $201.25			130			$	201.25				9.7
Total			1,323			$	129.04				8.4

Assumptions Used in Black-Scholes Option-Pricing Model

The weighted average grant date fair value of stock option awards using the Black-Scholes option pricing model was $73.86, $55.84, and $42.03 for each share subject to a stock option granted during the years ended December 31, 2015, 2014, and 2013, respectively, based on the following assumptions:

		Years Ended December 31,
		2015				2014				2013
Expected term of options in years			6.3				6.3				6.3
Expected volatility			39.0 - 40.2	%			41.5 - 42.5	%			42.8	%
Risk-free interest rate			1.5 - 2.0	%			2.1 - 2.3	%			2.5	%
Expected dividend yield			0.0	%			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

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

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

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

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

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration