Nature of Operations and Summary of Significant Accounting Policies Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019
Allowance for Credit Losses	$ 6,731	$ 6,719
Cumulative effect of accounting standards update upon adoption	(1,543,750)	(1,549,688)	$ (1,476,660)
Current quarter provision for expected credit losses	540
Write-offs charged against allowance	(1,023)
Recoveries of amounts previously written off	(3)
Other	5
Retained Earnings [Member]
Cumulative effect of accounting standards update upon adoption	$ (2,293,228)	(2,235,320)	$ (2,124,672)	$ (2,066,073)
Accounting Standards Update 2016-13 \| Retained Earnings [Member]
Cumulative effect of accounting standards update upon adoption		$ 493		$ 0

Amount of allowance for credit loss on accounts receivable.

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