Facility Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of facility operating lease expense [Abstract]
Cash basis payment	$ 71,340	$ 69,186	$ 142,525	$ 138,550
Straight-line expense	(217)	684	(440)	1,432
Amortization of deferred gain	(1,093)	(1,093)	(2,186)	(2,186)
Facility lease expense	$ 70,030	$ 68,777	$ 139,899	$ 137,796

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration