Minimum Fixed Charge Coverage Ratio (Detail) (Amended Credit Facility)	Mar. 31, 2012
March 31, 2012 through December 31, 2012
Debt Disclosure [Line Items]
Fixed Charge Coverage Ratio	1.25
March 31, 2013 through December 31, 2013
Debt Disclosure [Line Items]
Fixed Charge Coverage Ratio	1.50
March 31 2014 and thereafter
Debt Disclosure [Line Items]
Fixed Charge Coverage Ratio	1.75