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Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jul. 02, 2012
Consideration
Fair value of total consideration transferred		$ 7,900
Recognized amounts of identifiable assets acquired and liabilities assumed
Goodwill	5,231
Robart Transportation Inc [Member]
Consideration
Cash	(7,934)
Contingent consideration arrangement	(1,162)
Fair value of total consideration transferred	(9,096)
Acquisition related costs included in SG&A	150
Recognized amounts of identifiable assets acquired and liabilities assumed
Current assets	2,082
Property and equipment	44
Customers Lists	3,184
Current liabilities	(1,445)
Total identifiable net assets assumed	3,865
Goodwill	5,231
Total	$ 9,096