Represents the actual number of shares underlying each performance share award, expressed as a percentage.

No definition available.

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- Definition

Represents the number of shares issued annually under executive officer employment agreement.

+ References

No definition available.

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- Definition

Employee Purchase Plan Purchase Price Percentage of Fair Market Value

+ References

No definition available.

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- Definition

Number Of Share Based Compensation Plans

+ References

No definition available.

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- Definition

Share Based Compensation Arrangement By Employee Stock Purchase Program Number Of Shares Available For Purchase

+ References

No definition available.

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- Definition

Represents the maximum number of shares that can be awarded under a share-based compensation plan as a percentage of the target award.

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Options, Expiration Term

+ References

No definition available.

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- Definition

Represents the minimum number of shares that can be awarded under a share-based compensation plan as a percentage of the target award.

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Maximum Number of Shares that can be Granted to A Participant in Any Fiscal Year

+ References

No definition available.

+ Details

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- Definition

Represents the number of shares issued quarterly under executive officer employment agreement.

+ References

No definition available.

+ Details

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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
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

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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
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the 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
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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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
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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Stock-Based Employee Compensation (Details)	12 Months Ended
Stock-Based Employee Compensation (Details)	Dec. 31, 2015 plan $ / shares shares	Dec. 31, 2014 $ / shares shares	Dec. 31, 2013 $ / shares shares	Feb. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award
Number of stock-based compensation plans \| plan	2
Maximum number of award to be granted per individual	500,000
Maximum aggregate number of shares available under the employee stock purchase plan	506,322
Purchase price for each share of common stock as percentage of the average of the market price	85.00%
Shares of common stock issued under the ESPP plan	28,724	26,921	27,036
Weighted-average price of shares of common stock issued under the ESPP plan \| $ / shares	$ 72.52	$ 52.08	$ 33.16
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award
Quarterly issuance of common stock to Chief Executive Officer (shares)		10,086	10,086
Annually issuance of common stock to Chief Executive Officer (shares)		20,172	40,344
Lower Limit
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period for options and restricted stock	4 years
Upper Limit
Share-based Compensation Arrangement by Share-based Payment Award
Maximum expiry period for options	10 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Maximum actual number of shares underlying each performance share award as a percentage of target performance shares	200.00%	200.00%
Number of target performance shares issued (Shares)	161,479	63,771
Minimum actual number of shares underlying each performance share award as a percentage of target performance shares		0.00%
2008 Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award
Maximum number of shares authorized for issuance under stock-based compensation plans	11,000,000
Subsequent event \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Actual payout as percentage of target for performance shares issued in period				165.00%