Information about Geographic Areas - Schedule of Revenues by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 561,792	$ 30,167
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	552,496	17,108
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,851	9,231
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 445	$ 3,828