Income Taxes Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Deferred Tax Assets, Valuation Allowance	$ 357	$ 608
Income Taxes Paid	96,074	90,307	$ 61,885
Unrecognized Tax Benefits	5,449	7,421	7,104
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3,990	5,986
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	995	1,178
Income Tax penalties and interest expense (or benefits) included in income tax provision	(105)	$ 47	$ (155)
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	5,193
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	1,731
Minimum [Member]
Expiration of statutes of limitations impact on UTB balance	500
Maximum [Member]
Expiration of statutes of limitations impact on UTB balance	$ 1,500