Segment and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2012
Segment financial information
Net sales	$ 589,517	$ 570,397	$ 1,200,036	$ 1,149,971
Operating income for reportable segments	40,569	33,335	84,887	76,602
Assets used in business	1,037,626	898,013	1,037,626	898,013	962,183
Depreciation and amortization of property	3,014	2,780	6,036	5,598
Capital expenditures	2,951	6,880	6,843	14,022
Operating Segments [Member]
Segment financial information
Operating income for reportable segments	36,982	39,431	81,239	80,062
Service Center Based Distribution [Member]
Segment financial information
Net sales	480,476	458,315	978,302	922,173
Operating income for reportable segments	28,367	29,280	62,088	58,674
Assets used in business	834,839	681,019	834,839	681,019
Depreciation and amortization of property	2,565	2,353	5,129	4,651
Capital expenditures	2,880	6,546	6,594	13,346
Fluid Power Businesses [Member]
Segment financial information
Net sales	109,041	112,082	221,734	227,798
Operating income for reportable segments	8,615	10,151	19,151	21,388
Assets used in business	202,787	216,994	202,787	216,994
Depreciation and amortization of property	449	427	907	947
Capital expenditures	$ 71	$ 334	$ 249	$ 676