Credit Losses (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Credit Loss [Abstract]
Allowance for doubtful accounts receivable	$ 33,901,000	$ 29,381,000
Cumulative Effect on Retained Earnings, before Tax	2,706,000
Provision for Other Credit Losses	3,703,000
Accounts Receivable, Credit Loss Expense (Reversal)	811,000
Accounts Receivable, Other, Including Dispositions and Foreign Currency	(1,078,000)
Cumulative Effect on Retained Earnings, Tax	600,000
Cumulative Effect on Retained Earnings, Net of Tax	$ 2,100,000