Leasing (Future Minimum Lease Payments for Operating and Capital Leases) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Related parties [Member] | Operating lease expense [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2014	$ 4,555
2015	4,621
2016	4,633
2017	4,405
2018	4,196
Thereafter	11,331
Total	33,741
Non-related parties [Member] | Capital lease expense [Member]
Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2014	77
2015	26
2016	0
2017	0
2018	0
Thereafter	0
Total	103
Non-related parties [Member] | Operating lease expense [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2014	242,571
2015	228,364
2016	208,269
2017	186,686
2018	160,049
Thereafter	881,810
Total	1,907,749
Lease Agreements [Member]
2014	247,203
2015	233,011
2016	212,902
2017	191,091
2018	164,245
Thereafter	893,141
Total	$ 1,941,593