Results of Operations by Quarter (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Franchise tax settlement	$ 12,590	$ 12,590
Franchise tax settlement, after tax	8,058
Loss on early extinguishment of debt, before tax	27,279	27,279	1,972	607
Loss on early extinguishment of debt, after tax	$ 17,459