Segment and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2012
Segment financial information
Net sales	$ 621,654	$ 605,461	$ 1,821,690	$ 1,755,432
Operating income for reportable segments	43,477	42,019	128,364	118,621
Assets used in business	1,035,937	954,336	1,035,937	954,336	962,183
Depreciation and amortization of property	3,198	2,790	9,234	8,388
Capital expenditures	2,993	4,273	9,836	18,295
Operating Segments [Member]
Segment financial information
Operating income for reportable segments	44,964	46,401	126,203	126,462
Service Center Based Distribution [Member]
Segment financial information
Net sales	506,727	486,808	1,485,029	1,408,980
Operating income for reportable segments	35,357	35,910	97,445	94,584
Assets used in business	833,211	725,735	833,211	725,735
Depreciation and amortization of property	2,735	2,355	7,864	7,007
Capital expenditures	2,894	3,628	9,488	16,974
Fluid Power Businesses [Member]
Segment financial information
Net sales	114,927	118,653	336,661	346,452
Operating income for reportable segments	9,607	10,491	28,758	31,878
Assets used in business	202,726	228,601	202,726	228,601
Depreciation and amortization of property	463	435	1,370	1,381
Capital expenditures	$ 99	$ 645	$ 348	$ 1,321