Estimated Fair Values of Assets Acquired and Liabilities Assumed for Distributors 2014 Acquisition (Details) - Distributors 2014 [Member] $ in Thousands	Jan. 31, 2014 USD ($)
Business Acquisition [Line Items]
Current assets	$ 27,808
Property, plant and equipment	1,709
Goodwill	16,199
Current liabilities	(1,260)
Net assets acquired and liabilities assumed	44,456
Business Combinations, Preexisting Relationship, Liability Forgiveness	(5,971)
Consideration paid at closing	38,485
as initially reported
Business Acquisition [Line Items]
Current assets	35,909
Property, plant and equipment	2,000
Goodwill	7,552
Current liabilities	(1,005)
Net assets acquired and liabilities assumed	44,456
Business Combinations, Preexisting Relationship, Liability Forgiveness	(5,971)
Consideration paid at closing	38,485
Scenario, Adjustment [Member]
Business Acquisition [Line Items]
Current assets	(8,101)
Property, plant and equipment	(291)
Goodwill	8,647
Current liabilities	(255)
Net assets acquired and liabilities assumed	0
Business Combinations, Preexisting Relationship, Liability Forgiveness	0
Consideration paid at closing	$ 0