Investments in Non-Consolidated Affiliates (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Assets, Current	$ 312,389		$ 312,389		$ 272,736
NET EARNINGS (LOSS)	64,672	$ (5,591)	186,896	$ 26,988
Liabilities, Current	285,844		285,844		301,988
Liabilities	2,039,338		2,039,338		$ 2,146,248
REVENUES	$ 465,955	$ 404,146	$ 1,251,915	$ 1,171,217