Commitments and Contingencies - Future Minimum Lease Payments Under Noncancelable Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Future Minimum Payments Due, Remainder of 2013	$ 47,411
Future Minimum Payments Due, 2014	188,817
Future Minimum Payments Due, 2015	188,492
Future Minimum Payments Due, 2016	181,369
Future Minimum Payments Due, 2017	157,756
Future Minimum Payments Due, 2018 and thereafter	574,141
Total minimum lease payments	$ 1,337,986