Goodwill and Other Intangibles (Amortizable Intangibles) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Goodwill and Other Intangibles
Amortizable intangible assets, cost	$ 2,717	$ 21,687
Amortizable intangible assets, accumulated amortization expense	(928)	(13,243)
Net amortizable intangible assets	1,789	8,444
Favorable Leases [Member]
Goodwill and Other Intangibles
Amortizable intangible assets, cost	0	18,930
Amortizable intangible assets, accumulated amortization expense	0	(12,564)
Net amortizable intangible assets	0	6,366
Non-compete Agreements [Member]
Goodwill and Other Intangibles
Amortizable intangible assets, cost	2,717	2,757
Amortizable intangible assets, accumulated amortization expense	(928)	(679)
Net amortizable intangible assets	1,789	2,078
Unfavorable Leases [Member]
Goodwill and Other Intangibles
Amortizable intangibles, cost	0	10,180
Amortizable intangibles, accumulated amortization benefit	0	8,486
Net amortizable intangibles	$ 0	$ 1,694