Retail Joint Venture - Additional information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Variable Interest Entities [Line Items]
Assets	$ 14,273,347	$ 13,871,281
Liabilities	13,280,867	12,329,809
Long-term debt	11,369,045	10,403,859
Retail | Retail Joint Venture
Schedule of Variable Interest Entities [Line Items]
Assets	92,800	90,000
Liabilities	637,400	622,400
Long-term debt	$ 611,900	$ 611,700