Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Advances to suppliers	$ 27,635	$ 0
Collateral posted with broker for derivative instruments	10,306	2,759
Prepaid insurance	13,536	7,727
Derivative assets	2,075	5,164
Other	5,604	12,720
Total	$ 59,156	$ 28,370