Schedule II: Valuation and Qualifying Accounts (Details) - Allowance Accounts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement in Valuation Allowances and Reserves
Balance at the beginning of the year	$ 27,797	$ 169,374	$ 29,518
Additions
Amounts Charged Against Operations, net	1,549	4,105	144,135
Acquired Properties	1,315	0	0
Deductions
Uncollectible Accounts Written-off	0	(1,887)	(2,732)
Dispositions	(700)	(143,795)	(1,547)
Balance at the end of the year	4,565	27,797	$ 169,374
ASU 2016-02
Movement in Valuation Allowances and Reserves
Balance at the beginning of the year	$ 2,401
Deductions
Balance at the end of the year		$ 2,401