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Financing - Narrative (Details) - USD ($)							1 Months Ended	12 Months Ended
Financing - Narrative (Details) - USD ($)	Aug. 24, 2017	Aug. 14, 2017	Jul. 06, 2017	Jun. 28, 2017	Jul. 01, 2015	Apr. 02, 2015	Aug. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 105,000,000						$ 160,000,000
Term loan								$ 110,000,000	55,000,000
Unamortized debt issuance costs								1,513,000	1,597,000
Total debt								108,487,000	53,403,000
Proceeds from long-term borrowings								105,000,000	55,000,000	$ 0
Amount of debt prepayment		$ 50,000,000					$ 50,000,000	50,000,000	72,000,000	$ 6,500,000
Credit Agreement
Line of Credit Facility [Line Items]
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, gain on derivative								369,000	912,000
Credit Agreement \| Revolving Credit
Line of Credit Facility [Line Items]
Interest rate, effective percentage										2.96%
Weighted average interest rate										2.83%
Debt issuance costs, gross						$ 1,224,000
Unamortized debt issuance costs									$ 671,000
Credit Agreement \| Federal Funds Effective Swap Rate \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate						0.50%
Credit Agreement \| Base Rate \| Revolving Credit
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						0.25%
Credit Agreement \| Minimum \| Base Rate \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate						1.00%
Credit Agreement \| Minimum \| LIBOR \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate						2.00%
Credit Agreement \| Maximum \| Revolving Credit
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage						0.40%
Credit Agreement \| Maximum \| Base Rate \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate						1.75%
Credit Agreement \| Maximum \| LIBOR \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate						2.75%
Credit Agreement \| Secured Debt \| Revolving Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity						$ 25,000,000
Term loan						$ 80,000,000
New Credit Agreement
Line of Credit Facility [Line Items]
Total debt				$ 2,074,000				$ 671,000
Maximum amount, purchase of stock or stock options (up to)				2,000,000
Maximum amount, share repurchase (up to)				20,000,000
Maximum amount, dividend and distributions (up to)				6,000,000
New Credit Agreement \| Revolving Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity				35,000,000
Total debt				160,000,000
Proceeds from long-term borrowings			105,000,000	55,000,000
Incremental term loan maximum borrowing capacity (up to)				50,000,000
New Credit Agreement \| Long-term Debt
Line of Credit Facility [Line Items]
Total debt			105,000,000	55,000,000
New Credit Agreement \| Debt Instrument, Redemption, Period One \| Long-term Debt
Line of Credit Facility [Line Items]
Periodic payment			1,300,000	700,000
New Credit Agreement \| Debt Instrument, Redemption, Period Two \| Long-term Debt
Line of Credit Facility [Line Items]
Periodic payment			2,000,000	1,000,000
New Credit Agreement \| Debt Instrument, Redemption, Period Three \| Long-term Debt
Line of Credit Facility [Line Items]
Periodic payment			$ 2,600,000	$ 1,400,000
New Credit Agreement \| Federal Funds Effective Swap Rate \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate				0.50%
New Credit Agreement \| Base Rate \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate				1.00%
New Credit Agreement \| Minimum \| Revolving Credit
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage				0.25%
New Credit Agreement \| Minimum \| Base Rate \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate				0.75%
New Credit Agreement \| Minimum \| LIBOR \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate				1.75%
New Credit Agreement \| Maximum \| Revolving Credit
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage				0.50%
New Credit Agreement \| Maximum \| Base Rate \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate				2.00%
New Credit Agreement \| Maximum \| LIBOR \| Revolving Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate				3.00%
Variable Rate Term Loan \| Secured Debt
Line of Credit Facility [Line Items]
Amount of debt prepayment	$ 50,000,000
Write off of debt issuance costs	$ 829,000