Quarterly Data (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Quarterly Financial Information [Line Items]
Goodwill impairment charges	$ 332,100		$ 332,128
Net of Tax
Schedule Of Quarterly Financial Information [Line Items]
Goodwill impairment charges	$ 315,100