Goodwill and Other Intangibles (Amortizable Intangibles) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Amortizable intangible assets, cost	$ 51,627	$ 52,453
Amortizable intangible assets, accumulated amortization expense	(29,013)	(24,396)
Net amortization intangible assets	22,614	28,057
Favorable Leases [Member]
Amortizable intangible assets, cost	50,910	51,660
Amortizable intangible assets, accumulated amortization expense	(28,566)	(23,969)
Net amortization intangible assets	22,344	27,691
Noncompete Agreements [Member]
Amortizable intangible assets, cost	717	793
Amortizable intangible assets, accumulated amortization expense	(447)	(427)
Net amortization intangible assets	270	366
Unfavorable Leases [Member]
Amortizable intangibles, cost	49,380	49,380
Amortizable intangibles, accumulated amortization benefit	32,210	26,560
Net amortizable intangibles	$ 17,170	$ 22,820