Investments in Non-Consolidated Affiliates (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Assets, Current	$ 333,487		$ 333,487		$ 272,736
NET EARNINGS (LOSS)	79,934	$ (104,926)	122,224	$ 32,579
Liabilities, Current	335,868		335,868		301,988
Liabilities	2,096,127		2,096,127		$ 2,146,248
REVENUES	$ 409,872	$ 377,794	$ 785,960	$ 767,071