Debt (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Line of Credit Facility [Line Items]
Line Of Credit Facility Maximum Borrowing Capacity After Consideration Of Capacity Constraint	$ 179,862	$ 145,032
Debt (Textual) [Abstract]
Senior revolving credit facility	$ 200,000	200,000
Line of Credit Facility, Expiration Date	Mar. 13, 2019
Senior Leverage Ratio, Maximum	2.5
Senior Leverage Ratio, Minimum	1.0
Fixed Charge Coverage Ratio, Maximum	1.25
Fixed Charge Coverage Ratio, Minimum	1.0
Limit on asset dispositions	$ 20,000
Additional Margin on alternate base rate loans, Minimum	0.25%
Additional Margin on alternate base rate loans, Maximum	1.00%
Additional Margin on LIBOR loans, Minimum	1.25%
Additional Margin on LIBOR loans, Maximum	2.00%
Sublimit on Canadian dollar borrowings	$ 40,000
Additional Margin on CDOR loans, Minimum	1.25%
Additional Margin on CDOR loans, Maximum	2.00%
Additional Margin on Canadian prime rate loans, Minimum	1.75%
Additional Margin on Canadian prime rate loans, Maximum	2.50%
Maximum limit of consolidated funded indebtedness	2.5
Consolidated EBITDA as defined in the Credit Agreement	$ 71,900
Consolidated Funded Indebtedness	$ 13,100
CDOR Rate description	Sum of the annual rate of interest which is the rate determined as being the arithmetic average of the quotations of all institutions listed in respect of the relevant CDOR interest period for Canadian Dollar denominated bankers’ acceptances, plus 0.1%
Canadian prime rate description	Greater of (i) the rate of interest per annum most recently announced or established by JPMorgan Chase Bank, N.A., Toronto Branch as its reference rate in effect on such day for determining interest rates for Canadian Dollar denominated commercial loans in Canada and (ii) the CDOR Rate plus 1.0%
Assumption of debt from acquisition	$ 1,858	$ 0	$ 0
Minimum [Member]
Line of Credit Facility [Line Items]
Unused Credit Facility Fee	0.20%
Maximum [Member]
Line of Credit Facility [Line Items]
Unused Credit Facility Fee	0.35%
CDOR Rate [Member]
Line of Credit Facility [Line Items]
Spread on variable rate basis (percent)	0.10%
Canadian Prime Rate [Member]
Line of Credit Facility [Line Items]
Spread on variable rate basis (percent)	1.00%