Number of Companies Forming Peer Group

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- Definition

Ratio Of Options Foregone For Each Restricted Stock Unit Offered

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments other than Options, Expected to Vest, Percentage

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Portion Paid in Cash

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Portion Paid in Common Stock

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Portion Reserved to be Paid in Cash

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Number of Choice Programs

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Pay Out in Cash, Reserved Percentage

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Percentage Earning of Participants

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Percentage Paid Out in Stock

+ References

No definition available.

+ Details

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- Definition

Share based compensation arrangement by share based payment award percentage recorded as a liability.

+ References

No definition available.

+ Details

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- Definition

Three year performance cycle total shareholder return performance relative to the peer group one percent equal to best.

+ 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

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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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 65

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Stock Based Compensation - Additional Information (Detail)	1 Months Ended	9 Months Ended	12 Months Ended	36 Months Ended
	Jan. 31, 2012	Sep. 30, 2013	Dec. 31, 2012 option_program	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of option choice programs			2
Award performance period		3 years
Three year performance cycle total shareholder return performance relative to the peer group				46.00%
Shares distributed under PSU	300,000
Options Granted On A Discretionary Basis
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ratio of options foregone for each restricted stock unit offered		4
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)		226,738
Growth Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period		2 years
Grants in period (in shares)		130,920
Portion reserved to be paid in cash		100.00%
Growth Performance Stock Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest		0.00%
Growth Performance Stock Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest		250.00%
Performance Stock Unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Award performance period		3 years
Number of companies forming peer group		320
Base award percentage of Total Shareholder Return		91.00%
Percentage of award intended to pay out in stock		65.00%
Reserved percentage of award intended to pay out in cash		100.00%
Percentage recorded as a liability		35.00%
Performance Stock Unit awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base award percentage of Total Shareholder Return		0.00%
Performance Stock Unit awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base award percentage of Total Shareholder Return		175.00%
First Increment \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		12 months
Second Increment \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		24 months
Third Increment \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		36 months
Forecast \| Growth Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Portion paid in common stock		50.00%
Portion paid in cash		50.00%
Vests equally over 3 years \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights percentage		33.33%