Annual report pursuant to Section 13 and 15(d)

Leases - Additional Information (Detail)

v2.4.0.6
Leases - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 7 Months Ended 12 Months Ended 5 Months Ended
Dec. 31, 2012
Dec. 31, 2010
Successor [Member]
Dec. 31, 2012
Successor [Member]
Dec. 31, 2011
Successor [Member]
May 28, 2010
Predecessor [Member]
Leases [Line Items]          
Minimum lease period 1 year        
Rental expense for all operating leases   $ 4,989 $ 8,787 $ 9,039 $ 3,616