Segment and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016
Segment financial information
Net sales	$ 624,848	$ 641,904
Operating income for reportable segments	43,218	41,026
Assets used in business	1,299,439		$ 1,312,025
Capital expenditures	2,999	3,112
Operating Segments [Member]
Segment financial information
Net sales	624,848	641,904
Operating income for reportable segments	37,474	40,242
Assets used in business	1,299,439	1,376,260
Depreciation and amortization of property	3,650	3,930
Capital expenditures	2,999	3,112
Service Center Based Distribution [Member]
Segment financial information
Net sales	515,633	528,487
Operating income for reportable segments	25,646	29,959
Assets used in business	1,084,191	1,175,149
Depreciation and amortization of property	3,320	3,617
Capital expenditures	2,626	2,887
Fluid Power Businesses [Member]
Segment financial information
Net sales	109,215	113,417
Operating income for reportable segments	11,828	10,283
Assets used in business	215,248	201,111
Depreciation and amortization of property	330	313
Capital expenditures	$ 373	$ 225