Receivables (Rollforward of Allowance for Doubtful Accounts) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Allowance for Doubtful Accounts [Roll Forward]
Balance as of beginning of period	$ 0	$ 487
Current period provision (benefit)	0	(75)
Direct write-offs charged against the allowance	0	(412)
Balance as of end of period	$ 0	$ 0