Supplemental Financial Statement Information (Allowance for Credit on Losses for Accounts and Other Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of year	$ 29,179	$ 35,344
Amounts charged to expense	921	3,011
Write-offs, recoveries and other	(19,519)	(1,314)
Balance at end of period	10,581	37,041
Accounts and other receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at end of period	10,061	20,480
Other assets
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at end of period	$ 520	$ 16,561