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Supplemental Condensed Consolidating Guarantor and Non-Guarantor Financial Information - Additional Information (Detail) (10.875% Senior Notes, USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 16, 2011
10.875% Senior Notes
Debt Instrument [Line Items]
Interest rate on senior note	10.875%	10.875%	10.875%	10.875%
Aggregate principal amount outstanding	$ 265,000

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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