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Income Taxes - Major Jurisdictions (Detail)	12 Months Ended
	Dec. 31, 2012
United States [Member]
Income Tax Contingency [Line Items]
Tax Year	2005
New York State [Member]
Income Tax Contingency [Line Items]
Tax Year	2008
New York City [Member]
Income Tax Contingency [Line Items]
Tax Year	2011
United Kingdom [Member]
Income Tax Contingency [Line Items]
Tax Year	2006
Italy [Member]
Income Tax Contingency [Line Items]
Tax Year	2007

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- Details

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X

- Definition

Tax year being audited in the income tax examination, in CCYY format.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration