Condensed Consolidated Financial Information for Guarantor Subsidiaries and Non-Guarantor Subsidiaries - Condensed Consolidating Statement of Cash Flows (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Statement of Cash Flows [Abstract]
Cash acquired from acquisitions	$ 0	$ 36,113