INCOME TAXES Deferred Tax Liability Not Recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Asset (Liability) [Line Items]
Unrecognized Tax Benefits	$ 12,193	$ 13,011	$ 1,763	$ 1,841
Decreases for tax positions taken during a prior period	(818)		(78)
Increases for tax positions taken during a prior period		11,248
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 0	$ 400
Unrecognized tax benefits including penalties and interest			1,800
Unrecognized Tax Benefits that Would Impact Effective Tax Rate			$ 1,800