Debt and Interest Expense - Interest Expense Table (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Debt Instrument [Line Items]
Interest expense	[1]	$ (65,876)	$ (38,015)	[2]
Third Parties [Member]
Debt Instrument [Line Items]
Long-term and short-term debt		(67,096)	(41,536)
Amortization of debt issuance costs and commitment fees		(3,152)	(2,864)
Capitalized interest		6,205	6,962
Interest expense		(64,043)	(37,438)
Affiliates [Member]
Debt Instrument [Line Items]
APCWH Note Payable		(1,833)	(577)
Interest expense	[3]	$ (1,833)	$ (577)

[1] Includes affiliate (as defined in Note 1) amounts of $1.8 million and $0.6 million for the three months ended March 31, 2019 and 2018, respectively. See Note 1 and Note 10.

[2] Financial information has been recast to include the financial position and results attributable to AMA. See Note 1 and Note 3.

[3] Includes amounts related to the APCWH Note Payable (see Note 1 and Note 10).