Credit Losses (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Allowance for doubtful accounts receivable	$ 40,534	$ 38,825	$ 40,474		$ 29,381
Cumulative Effect on Retained Earnings, before Tax	0	2,706
Provision for Other Credit Losses	2,209	8,545
Accounts Receivable, Credit Loss Expense (Reversal)	(2,460)	(1,490)
Accounts Receivable, Other, Including Dispositions and Foreign Currency	311	(317)
Accounting Standards Update 2016-13
Retained Earnings (Accumulated Deficit)		$ (2,112)		$ 2,100
Retained Earnings Effect, Tax	$ 600