XML 105 R88.htm IDEA: XBRL DOCUMENT

Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Net deferred tax liabilities	$ 97.2	$ 112.1
Valuation allowance	0
Unrecognized tax benefits	$ 0

The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns.

+ References+ Details