Goodwill and Other Intangibles (Amortizable Intangibles) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Amortizable Intangibles
Amortizable intangible assets, cost	$ 29,847	$ 32,802
Amortizable intangible assets, accumulated amortization expense	(18,518)	(20,400)
Net amortizable intangible assets	11,329	12,402
Favorable Leases [Member]
Amortizable Intangibles
Amortizable intangible assets, cost	27,960	32,070
Amortizable intangible assets, accumulated amortization expense	(18,104)	(19,991)
Net amortizable intangible assets	9,856	12,079
Non-compete Agreements [Member]
Amortizable Intangibles
Amortizable intangible assets, cost	1,887	732
Amortizable intangible assets, accumulated amortization expense	(414)	(409)
Net amortizable intangible assets	1,473	323
Unfavorable Leases [Member]
Amortizable Intangibles
Amortizable intangibles, cost	19,950	28,580
Amortizable intangibles, accumulated amortization benefit	15,840	22,415
Net amortizable intangibles	$ 4,110	$ 6,165