FEDERAL INCOME TAX (Federal Income Tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation Of Consolidated Federal Income Tax Expense (Benefit) [Line Items]
Consolidated federal income tax expense (benefit)	$ 2,059	$ (11,405)	$ (29,220)
Continuing and Discontinuing Operations
Reconciliation Of Consolidated Federal Income Tax Expense (Benefit) [Line Items]
Current	(7,843)	18,493	1,989
Deferred	9,902	(21,791)	(26,719)
Consolidated federal income tax expense (benefit)	$ 2,059	$ (3,298)	$ (24,730)