SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CECL
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning Of Period	$ 3,626	$ 3,541	$ 3,161
Charged to Costs and Expenses	865	782	923
Charged to Other Accounts	1,647	0	0
Deductions from Reserve	(220)	(697)	(543)
Balance at End of Period	5,918	3,626	3,541
Deferred tax valuation allowance
VALUATION AND QUALIFYING ACCOUNTS
Balance at Beginning Of Period	23,320	11,189	5,414
Charged to Costs and Expenses	3,085	12,058	4,230
Charged to Other Accounts	700	1,508	2,604
Deductions from Reserve	(4,000)	(1,435)	(1,059)
Balance at End of Period	$ 23,105	$ 23,320	$ 11,189