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Stock Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 6 Months Ended
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Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Long-term equity incentive plan, termination date | October 19, 2014
Long-term equity incentive plan, amendment date | May 01, 2013
Long-term equity incentive plan, term | 10 years
Number of shares authorized under plan | 10,550,000
Share based awards | 8,320,115
Number of additional shares authorized for grant | 2,000,000
Restricted Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period of equity awards granted to employees, years | 4 years
Unrecognized compensation cost related to nonvested awards granted under the equity incentive plan | $ 25.9
Expected weighted-average period to recognize the cost of stock awards (in years) | 2 years 10 months 24 days
Performance Shares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period of equity awards granted to employees, years | 4 years
Unrecognized compensation cost related to nonvested awards granted under the equity incentive plan | $ 3.4
Expected weighted-average period to recognize the cost of stock awards (in years) | 4 years
After Amendment |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Long-term equity incentive plan, termination date | 2023-05-01

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- Definition The date when the equity incentive plan was amended, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year). + References No definition available. + Details
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- Definition The number of years the long term equity incentive plan termination date was extended. + References No definition available. + Details
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- Definition The date when the equity incentive plan expires, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year). + References No definition available. + Details
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- Definition Options, restricted stock and performance units granted since inception of the plan, net of forfeitures. + References No definition available. + Details
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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 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, 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 + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + 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 + Details
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