Segment and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Segment financial information
Net sales	$ 679,994us-gaap_SalesRevenueNet	$ 618,006us-gaap_SalesRevenueNet	$ 2,074,021us-gaap_SalesRevenueNet	$ 1,805,260us-gaap_SalesRevenueNet
Operating income for reportable segments	43,772us-gaap_OperatingIncomeLoss	40,173us-gaap_OperatingIncomeLoss	136,744us-gaap_OperatingIncomeLoss	119,549us-gaap_OperatingIncomeLoss
Assets used in business	1,466,153us-gaap_Assets	1,096,651us-gaap_Assets	1,466,153us-gaap_Assets	1,096,651us-gaap_Assets	1,334,169us-gaap_Assets
Depreciation and amortization of property	4,461	3,327	12,792	10,119
Capital expenditures	3,203	2,366	11,009	6,492
Operating Segments [Member]
Segment financial information
Operating income for reportable segments	45,539	42,196	142,811	115,958
Service Center Based Distribution [Member]
Segment financial information
Net sales	557,088	492,678	1,701,722	1,450,705
Operating income for reportable segments	33,788	28,754	105,903	82,695
Assets used in business	1,256,266	879,349	1,256,266	879,349
Depreciation and amortization of property	4,129	2,964	11,741	8,951
Capital expenditures	2,801	2,021	9,875	5,755
Fluid Power Businesses [Member]
Segment financial information
Net sales	122,906	125,328	372,299	354,555
Operating income for reportable segments	11,751	13,442	36,908	33,263
Assets used in business	209,887	217,302	209,887	217,302
Depreciation and amortization of property	332	363	1,051	1,168
Capital expenditures	$ 402	$ 345	$ 1,134	$ 737

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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