SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for deferred tax asset
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 1,748	$ 0	$ 1,530
Charged to Expenses	0	0	0
Adjustments to Valuation Accounts	851	1,748	(1,530)
Deductions	0	0	0
Balance at End of Year	2,599	1,748	0
Allowance for uncollectible accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	11,408	7,921	5,920
Charged to Expenses	46,844	4,402	2,532
Adjustments to Valuation Accounts	(12,844)	(915)	(531)
Deductions	0	0	0
Balance at End of Year	45,408	11,408	7,921
Allowance for notes receivable
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	0	0	0
Charged to Expenses	250	0	0
Adjustments to Valuation Accounts	0	0	0
Deductions	0	0	0
Balance at End of Year	650	0	$ 0
Allowance for notes receivable | ASU 2019-05
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 400
Balance at End of Year		$ 400