Acquisitions and Purchase Accounting Estimated Fair Values of Assets Acquired and Liabilities Assumed for Distributors 2014 Acquisition (Details) (Details) (Distributors 2014 [Member], USD $) In Thousands, unless otherwise specified	Jan. 31, 2014
Business Acquisition [Line Items]
Business Combinations, Preexisting Relationship, Liability Forgiveness	$ (5,971)
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)
Business Acquisition Cost Of Acquired Entity Consideration Paid	$ 38,485