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Financing - Narrative (Details) - USD ($)					12 Months Ended
Financing - Narrative (Details) - USD ($)	May 08, 2019	Aug. 24, 2017	Aug. 14, 2017	Jul. 01, 2015	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Line of Credit Facility [Line Items]
Voluntary principal payment					$ 50,000,000	$ 0	$ 0
Derivative, term of contract				5 years
Fixed quarterly interest rate				1.52%
Derivative notional amount				$ 39,250,000
Outstanding balance, percent (equal to)				50.00%
Derivative, loss on derivative					350,000
Derivative, gain on derivative						369,000
Term loan
Line of Credit Facility [Line Items]
Gross debt					75,000,000	110,000,000
Credit Agreement
Line of Credit Facility [Line Items]
Debt issuance costs, gross							$ 2,074,000
Write off of debt issuance costs					671,000	$ 829,000
Credit Agreement \| Revolving Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity					120,000,000
Remaining borrowing capacity					40,000,000
Letters of credit outstanding					$ 700,000
Debt Instrument, Interest Rate, Stated Percentage					3.65%
Credit Agreement \| Long-term Debt
Line of Credit Facility [Line Items]
Voluntary principal payment		$ 50,000,000	$ 50,000,000
Periodic payment					$ 3,000,000
Gross debt					$ 115,000,000
Credit Agreement \| Federal Funds Effective Swap Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate					0.50%
Credit Agreement \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate					1.00%
Credit Agreement \| Minimum \| Revolving Credit
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage					0.20%
Credit Agreement \| Minimum \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate					0.25%
Credit Agreement \| Minimum \| LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate					1.25%
Credit Agreement \| Maximum \| Revolving Credit
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage					0.40%
Credit Agreement \| Maximum \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate					1.25%
Credit Agreement \| Maximum \| LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate					2.25%
Credit Agreement \| Term loan
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 75,000,000
Maximum amount, purchase of stock or stock options (up to)					2,000,000
Maximum amount, share repurchase (up to)					35,000,000
Maximum amount, dividend and distributions (up to)					$ 10,000,000
Amendment
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 35,000,000
Debt issuance costs, gross	1,367,000
Write off of debt issuance costs	$ 137,000
Debt instrument, term	2 years
Deferred financing cost capitalized	$ 370,000