Exercise Price Minimum Percent of Fair Market Value Threshold for Issuance of I S O to 10% shareholder

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- Definition

Maximum Term After Sale Event Where Awards Fully Vest When Service Relationship Terminated Without Cause

+ References

No definition available.

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- Definition

Maximum Term That May Be Granted To Terminated Employee To Exercise Awards Prior To Termination

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No definition available.

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- Definition

Share based compensation arrangement by share based payment award, award expiration dating conditional.

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No definition available.

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- Definition

Threshold of total combined voting interest of all class of stock for ISO.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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- Definition

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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- Definition

Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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- Definition

As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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- Definition

As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited.

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares authorized for grant under the plan	30,400,000	30,400,000
Percentage of voting interest to be held by optionee		10.00%
Exercise price as a percentage of fair value at the time of grant		110.00%
Expiration period of options from the date of grant		10 years
Expiration period for optionee who meets the 10% criteria		5 years
Vesting period		4 years
Maximum months after sale event where awards fully vest when service relationship terminated without cause		18 months
Maximum number of days that may be granted to terminated employee to exercise awards prior to termination			15 days
Share-based compensation arrangement by share-based payment award, options, vested in period, fair value		$ 12,300	$ 19,500	$ 24,700
Total unrecognized estimated compensation cost	$ 10,100	$ 10,100
Weighted-average period of recognition of unrecognized compensation cost (years)		1 year 5 months
Total intrinsic value of options exercised during the period		$ 47,100	60,600	45,200
Unvested options	400,000	400,000
Aggregate intrinsic value of unvested options	$ 9,200	$ 9,200
Weighted-average exercise price of unvested options	$ 73.13	$ 73.13
Weighted-average remaining contractual term of unvested stock options (years)		7 years 5 months
Employee service share-based compensation, cash received from exercise of stock options		$ 39,500
Tax benefit from exercise of stock options		17,700
Stock-based compensation expense		33,951	36,861	35,298
Fair value of stock options and restricted stock awards assumed in connection with acquisitions		$ 3,528	$ 68	$ 0
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of performance-based restricted stock units granted		34,450	47,000	94,300
Value of the restricted stock units on the grant date	$ 81.61	$ 81.61	$ 65.94	$ 50.05
Stock-based compensation expense		$ 3,100	$ 2,500	$ 3,600
Deferred Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense		$ 4,000	$ 3,500	2,500
Restricted stock units earned	189,099	43,134
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period		4 years
Number of performance-based restricted stock units granted		344,500	364,150
Value of the restricted stock units on the grant date	$ 86.34	$ 86.34	$ 82.13
Stock-based compensation expense		$ 12,500	$ 5,800
Restricted stock units earned		85,713
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number	571,462	571,462	344,750
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Value of the restricted stock units on the grant date	$ 86.38	$ 86.38	$ 81.52
Stock-based compensation expense		$ 400	$ 100
Share-based compensation arrangement by share-based payment award, shares issued in period		51,795	20,667
2015 Other Acquisitions [Member] \| Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Value of the restricted stock units on the grant date	$ 90.48	$ 90.48
Stock-based compensation expense		$ 600
Share-based compensation arrangement by share-based payment award, shares issued in period		68,451
Stock issued during period, value, restricted stock award		$ 6,200
Apache Design Inc [Member] \| Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock-based compensation expense			$ 4,700	$ 3,800
Minimum [Member] \| Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period		1 year
Maximum [Member] \| Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period		3 years