Share based compensation by share based payment award option outstanding weighted average number of shares.

No definition available.

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- Details

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii)

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

+ Details

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option 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)(1)(i)

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

+ Details

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Data Type:	num:perShareItemType
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- Definition

Weighted average remaining contractual term for option awards outstanding, 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 (e)(1)

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

+ Details

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)

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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)

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

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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Summary of Stock Options Summarized by Exercise Price (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Weighted Average, Exercise Price	$ 9.22	$ 7.76	$ 7.70	$ 7.44
Exercisable Weighted Average, Exercise Price	$ 7.82	$ 7.70	$ 7.95	$ 7.26
Incentive Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Weighted Average, Shares	724,904
Outstanding Weighted Average, Remaining Life (Months)	90 months	83 months
Outstanding Weighted Average, Exercise Price	$ 9.22	$ 7.76
Exercisable Weighted Average, Shares	447,879	554,362
Exercisable Weighted Average, Exercise Price	$ 7.82	$ 7.70
Incentive Stock Option Plan \| Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised, Lower Range	$ 7.50
Outstanding Weighted Average, Shares	421,200
Outstanding Weighted Average, Remaining Life (Months)	71 months
Outstanding Weighted Average, Exercise Price	$ 7.50
Exercisable Weighted Average, Shares	421,200
Exercisable Weighted Average, Exercise Price	$ 7.50
Incentive Stock Option Plan \| Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised, Lower Range	$ 11.32
Options exercised, Upper Range	$ 14.75
Outstanding Weighted Average, Shares	303,704
Outstanding Weighted Average, Remaining Life (Months)	115 months
Outstanding Weighted Average, Exercise Price	$ 11.61
Exercisable Weighted Average, Shares	26,679
Exercisable Weighted Average, Exercise Price	$ 12.90
Performance Based Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding Weighted Average, Shares	107,689
Outstanding Weighted Average, Remaining Life (Months)	36 months
Outstanding Weighted Average, Exercise Price	$ 11.49
Performance Based Options \| Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised, Lower Range	$ 11.49
Outstanding Weighted Average, Shares	107,689
Outstanding Weighted Average, Remaining Life (Months)	36 months
Outstanding Weighted Average, Exercise Price	$ 11.49