Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Distribution from unconsolidated affiliates	$ 1,248	$ 429
Prior Period Adjustment [Abstract]
Prior Period Reclassification Adjustment		$ 1,900
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability	89,241
Right-of-use assets	$ 89,824			$ 0
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Description of Principal Activities	0.2
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Description of Principal Activities	0.5
Cardinal Pipeline Company, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	45.00%			45.00%
Pine Needle LNG Company, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	35.00%			35.00%
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability			$ 91,300
Right-of-use assets			$ 91,300