Goodwill and Intangibles (Details Textuals) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Goodwill [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		8.00%
Goodwill	$ 203,963		$ 202,700	$ 254,406
Goodwill, Purchase Accounting Adjustments	3,220
Other Intangible Assets, Net		$ 100,664
Goodwill and Intangibles (Textuals) [Abstract]
Amortization expense for the remainder of 2017	12,200
Amortization expense for 2018	22,200
Amortization expense for 2019	20,500
Amortization expense for 2020	18,700
Amortization expense for 2021	17,200
Amortization expense for 2022	14,900
Measurement period adjustment impact [Domain]
Goodwill [Line Items]
Amortization	156
Customer Relationships [Member]
Goodwill [Line Items]
Finite-Lived Intangible Assets, Purchase Accounting Adjustments	2,636
Trade Names [Member]
Goodwill [Line Items]
Finite-Lived Intangible Assets, Purchase Accounting Adjustments	584
Fluid Power Businesses [Member]
Goodwill [Line Items]
Accumulated goodwill impairment losses	36,605
Service Center Based Distribution Segment [Member]
Goodwill [Line Items]
Goodwill	200,193		$ 198,486	$ 253,477
Accumulated goodwill impairment losses	64,794
Goodwill, Purchase Accounting Adjustments	$ 3,220
Canada Service Centers reporting unit [Member]
Goodwill [Line Items]
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount		$ 8,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		5.00%
Goodwill		$ 163,000
U.S. Service Centers reporting unit [Domain]
Goodwill [Line Items]
Goodwill		$ 2,628