Name:	us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Amount of decrease in additional paid in capital (APIC) resulting from a tax deficiency associated with a share-based compensation plan other than an employee stock ownership plan (ESOP).

No definition available.

Name:	us-gaap_AdjustmentsToAdditionalPaidInCapitalIncomeTaxDeficiencyFromShareBasedCompensation
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Data Type:	xbrli:monetaryItemType
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Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

No definition available.

Name:	us-gaap_DeferredTaxExpenseFromStockOptionsExercised
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_IncreaseDecreaseInStockholdersEquityRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of share options (or share units) exercised during the current period.

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