Supplemental Cash Flow Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2012	Sep. 30, 2012	Dec. 31, 2012
Cash Flow Supplemental Disclosures [Line Items]
Non-cash charges associated with restructuring and other, net	$ 71,000	$ 71,000	$ 61,809