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Income Taxes Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Computed expected tax expense	21.00%	21.00%	21.00%	28.10%	35.00%
Deferred Tax Assets, Valuation Allowance	$ 473	$ 415
Income Taxes Paid	63,692	62,005		$ 60,382
Unrecognized Tax Benefits	10,112	10,495		10,227
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	9,434	9,892
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1,565	1,514
Income Tax penalties and interest expense (or benefits) included in income tax provision	38	$ 128		$ 165
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	8,108
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	532
Minimum [Member]
Expiration of statutes of limitations impact on UTB balance	3,500
Maximum [Member]
Expiration of statutes of limitations impact on UTB balance	$ 4,500

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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