Contingent Matters (Details) - Jun. 30, 2015 $ in Thousands	USD ($) Party
Contingent Matters [Abstract]
Contingent liability for customer debt	$ 2,427
Maximum potential amount of future payments for customer debt	2,427
Liability recorded related to guarantees	117
Guarantor Obligations [Line Items]
Contingent liabilities for letters of credit	$ 12,678
Number of parties involved in EPA cleanup | Party	300
Letter of Credit Wells Fargo [Member]
Guarantor Obligations [Line Items]
Contingent liabilities for letters of credit	$ 11,788
Outstanding letters of credit, maximum expiration date	Feb. 28, 2019
Letters of Credit Osborn [Member]
Guarantor Obligations [Line Items]
Performance bank guarantee of subsidiary	$ 871
Letters of Credit Astec Australia [Member]
Guarantor Obligations [Line Items]
Performance bank guarantee of subsidiary	19
Letters of Credit Astec Brazil [Member]
Guarantor Obligations [Line Items]
Contingent liabilities for letters of credit issued on behalf of foreign subsidiaries	$ 8,674