Share-based Compensation Arrangement by Share-based Payment Award, Award Purchase Period

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-Publisher FASB
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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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).

+ 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)(2)(iii)(1)
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+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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.

+ References

No definition available.

+ Details

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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- Definition

Value, after forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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-Publisher FASB
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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
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-Name Accounting Standards Codification
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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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- Details

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Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended	6 Months Ended	9 Months Ended	22 Months Ended	24 Months Ended
	Dec. 31, 2015	Mar. 31, 2016	Sep. 30, 2015	Dec. 31, 2016	Aug. 31, 2016	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2016
Stockholders' equity
Compensation cost not yet recognized				$ 7,900		$ 7,900	$ 7,900	$ 7,900
Restricted Stock Units (RSUs)
Stockholders' equity
Options expensed (reversed)						$ 500
Employee stock option
Stockholders' equity
Options expensed (reversed)				(200)
Fair value of options granted				$ 5,500
2015 Stock Incentive Plan \| Nonvested stock units issued (NSUs)
Stockholders' equity
Award vesting period of the grants						3 years
Number of shares granted						83,971
Weighted average grant date fair value (in USD per share)						$ 65.86
2015 Stock Incentive Plan \| Time-based equity award
Stockholders' equity
Award vesting period of the grants						3 years
Number of shares granted				18,546		174,370
Weighted average grant date fair value (in USD per share)				$ 54.46		$ 61.94
2015 Stock Incentive Plan \| Restricted Stock Units (RSUs)
Stockholders' equity
Number of shares granted				0
2015 Employee Stock Purchase Plan
Stockholders' equity
Common stock reserved for issuance (in shares)	1,000,000
Employee stock purchase plan, purchase period (in months)		6 months
Employee stock purchase plan discount			15.00%
Stock purchased during the period (in shares)					7,000,000
Employee stock purchase price, (in USD per share)					$ 55.55
2006 Equity Incentive Plan \| Restricted Stock Units (RSUs)
Stockholders' equity
Options expensed (reversed)						$ 2,200
2015 Stock Repurchase Program
Stockholders' equity
Stock repurchased during period, (in shares)						222,500	2,020,000
Repurchase of common stock						$ 12,571	$ 134,706
Treasury stock acquired, average cost per share (in USD per share)						$ 56.51		$ 66.69
Remaining stock repurchase amount approved by Board of Directors				$ 65,294		$ 65,294	$ 65,294	$ 65,294
Retained Earnings
Stockholders' equity
Repurchase of common stock						$ 12,570
Portion vesting in 2016 \| Longterm incentive award \| Restricted Stock Units and Stock Appreciation Rights
Stockholders' equity
RSU's vested	20.00%
Portion vesting in 2015 \| Longterm incentive award \| Restricted Stock Units and Stock Appreciation Rights
Stockholders' equity
RSU's vested	80.00%