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Financing - Narrative (Details) - USD ($)						1 Months Ended	3 Months Ended		9 Months Ended
Financing - Narrative (Details) - USD ($)	Aug. 17, 2017	Aug. 14, 2017	Jul. 06, 2017	Jun. 28, 2017	Jul. 01, 2015	Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018	Jun. 27, 2017
Line of Credit Facility [Line Items]
Long-term debt						$ 128,769,000	$ 128,769,000		$ 128,769,000		$ 108,487,000
Proceeds from long-term borrowings									0	$ 105,000,000
Repayments of debt									35,000,000	0
Debt issuance costs						1,231,000	1,231,000		1,231,000		1,513,000
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							93,000		225,000
Derivative, gain on derivative								$ 138,000		$ 341,000
Credit Agreement
Line of Credit Facility [Line Items]
Long-term debt			$ 105,000,000	$ 55,000,000
Proceeds from long-term borrowings			105,000,000	55,000,000
Incremental term loan				50,000,000
Line of credit, incremental term loan borrowing capacity				$ 85,000,000								$ 35,000,000
Ticking fee rate (in percentage)				0.30%
Debt issuance costs						671,000	$ 671,000		$ 671,000		671,000
Credit Agreement \| Term Loan
Line of Credit Facility [Line Items]
Long-term debt				$ 160,000,000
Credit Agreement \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity (up to)				$ 35,000,000
Repayments of debt	$ 50,000,000					$ 15,000,000
Credit Agreement \| Long-term Debt
Line of Credit Facility [Line Items]
Repayments of debt		$ 50,000,000
Long-term debt, weighted average interest rate						4.30%	4.30%		4.30%
Write off of deferred debt issuance cost		$ 829,000
Credit Agreement \| Federal Funds \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.50%
Credit Agreement \| Base Rate \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.00%
Credit Agreement \| Minimum \| Base Rate \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				0.75%
Credit Agreement \| Minimum \| LIBOR \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				1.75%
Credit Agreement \| Maximum \| Base Rate \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				2.00%
Credit Agreement \| Maximum \| LIBOR \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate				3.00%
Credit Agreement \| Period one \| Long-term Debt
Line of Credit Facility [Line Items]
Debt instrument, periodic payment			1,300,000	$ 700,000
Credit Agreement \| Period two \| Long-term Debt
Line of Credit Facility [Line Items]
Debt instrument, periodic payment			2,000,000	1,000,000
Credit Agreement \| Period three \| Long-term Debt
Line of Credit Facility [Line Items]
Debt instrument, periodic payment			$ 2,600,000	1,400,000
Term Loan \| Credit Agreement
Line of Credit Facility [Line Items]
Purchase of stock (up to)				2,000,000
Share repurchase (up to)				20,000,000
Dividend and distributions (up to)				$ 6,000,000
Deferred finance costs											$ 2,074,000
Term Loan \| Credit Agreement \| Minimum \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage				0.25%
Term Loan \| Credit Agreement \| Maximum \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage				0.50%