Investments in Non-Consolidated Affiliates (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Noncontrolling Interest [Line Items]
Assets, Current	$ 266,791				$ 259,221				$ 266,791	$ 259,221
NET EARNINGS									61,202	69,285	$ 18,495
Liabilities, Current	263,239				229,134				263,239	229,134
Liabilities	2,359,836				2,034,147				2,359,836	2,034,147
REVENUES	403,351	$ 366,073	$ 334,576	$ 348,183	280,779	$ 204,919	$ 203,607	$ 203,040	1,452,183	892,345	1,068,200
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Assets, Current	64,392				64,262				64,392	64,262
Total Expenses									(143,775)	(228,169)	(196,334)
NET EARNINGS									(29,510)	(26,141)	(23,808)
Long-Lived Assets	213,940				80,724				213,940	80,724
Liabilities, Current	(155,451)				(38,938)				(155,451)	(38,938)
Liabilities	(123,837)				(102,657)				(123,837)	(102,657)
Stockholders' Equity Attributable to Noncontrolling Interest	$ 956				$ (3,391)				956	(3,391)
REVENUES									$ 114,265	$ 202,028	$ 172,526