Long-Lived Assets - Summary of Depreciation, Amortization and Accretion (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Accretion expense	$ 538	$ 767	$ 807
Software Operations [Member]
Property, Plant and Equipment [Line Items]
Accretion expense	$ (29,000)	$ 29,000