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Segment Information - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Revenue, Major Customer [Line Items] | |||
| Revenues from foreign operations | $ 861.5 | $ 535.0 | $ 256.1 |
| Property and equipment held in foreign countries | $ 151.9 | $ 114.8 | |
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Canada [Member]
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| Revenue, Major Customer [Line Items] | |||
| Percentage of total revenue which were earned in Canada | 96.00% | 97.00% | 88.00% |
| X | ||||||||||
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- Definition
Percentage of significant concentrations of revenue earned in particular countries. No definition available.
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| X | ||||||||||
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- Definition
Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in foreign countries in total in which the entity holds assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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