Statements of Operations-Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Depreciation and amortization
Depreciation of property, plant and equipment	$ 4,075	$ 4,123	$ 8,186	$ 8,351
Amortization of intangible assets	1,260	1,057	2,519	2,126
Amortization of other assets	58	61	117	117
Depreciation and amortization	5,393	5,241	10,822	10,594
Statements Of Operations Additional Information [Line Items]
Acquisition related accrued interest	344		689
Amortization of deferred financing costs and debt discount	242	242	484	483
Other	169	115	255	228
Interest expense	4,024	3,550	7,892	7,102
Interest (income)	(57)	(35)	(106)	(97)
Interest expense, net	3,967	3,515	7,786	7,005
Term B Loan
Statements Of Operations Additional Information [Line Items]
Interest expense	2,927	2,957	5,862	5,921
Revolving credit facility
Statements Of Operations Additional Information [Line Items]
Interest expense	$ 342	$ 236	$ 602	$ 469