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Stock Compensation - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||
| Share-based compensation expense | $ 4.4us-gaap_AllocatedShareBasedCompensationExpense | $ 1.3us-gaap_AllocatedShareBasedCompensationExpense |
| X | ||||||||||
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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