Goodwill and Other Intangibles (Amortizable Intangibles) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Amortizable intangible assets, cost	$ 50,397	$ 51,557
Amortizable intangible assets, accumulated amortization expense	(35,489)	(32,891)
Net amortizable intangible assets	14,908	18,666
Favorable leases [Member]
Amortizable intangible assets, cost	49,780	50,910
Amortizable intangible assets, accumulated amortization expense	(35,145)	(32,463)
Net amortizable intangible assets	14,635	18,447
Noncompete Agreements [Member]
Amortizable intangible assets, cost	617	647
Amortizable intangible assets, accumulated amortization expense	(344)	(428)
Net amortizable intangible assets	273	219
Unfavorable leases [Member]
Amortizable intangibles, cost	49,200	49,380
Amortizable intangibles, accumulated amortization benefit	40,263	36,758
Net amortizable intangibles	$ 8,937	$ 12,622