SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - Allowance for uncollectible Accounts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 0	$ 8,328	$ 52,924
Acquisitions	0	0	0
Amounts charged to income	0	13,458	21,715
Amounts written off	0	21,786	66,311
Balance at end of year	$ 0	$ 0	$ 8,328