Intangible Assets Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 1997
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 33,424	$ 15,799
Document Period End Date	Dec. 31, 2019
Purchase premium customer relationships	$ 13,400	0
Net intangible assets	20,245	7,059
Amortization of Intangible Assets	745	647	$ 616
Future Amortization of Intangible Assets
2020	745
2021	647
2022	647
2023	647
2024	647
Concession Fees [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	6,800	6,800
Accumulated amortization of intangible assets	6,052	5,780
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	13,224	8,999
Accumulated amortization of intangible assets	7,127	$ 2,960
Service Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	4,128
Useful life of intangible assets				25 years
Infrastructure [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	3,831
Contractual Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 1,040
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life of intangible assets	5 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life of intangible assets	70 years