The total amount of the contingent obligation under letters of credit issued on behalf of foreign subsidiaries.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Term of the interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
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- Definition

Additional borrowing capacity under the credit facility due to a new amended and restated credit agreement between the Company and the Wells Fargo.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The additional percentage interest rate above the base rate of LIBOR, Prime or whatever the base rate is based on.

+ References

No definition available.

+ Details

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Namespace Prefix:	aste_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of equipment financing term loans.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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Period Type:	instant

- Definition

Performance bank guarantee issued by foreign subsidiaries banks to foreign subsidiaries customers.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum dollar amount of letters of credit that can be issued against the primary line of credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	aste_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The under utilized credit facility resulting in the unused facility fee, stated as a percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	aste_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

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Period Type:	instant

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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Debt (Details) $ in Thousands	9 Months Ended
Debt (Details) $ in Thousands	Sep. 30, 2019 USD ($) Loan	Feb. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)	Apr. 12, 2017 USD ($)
Debt [Abstract]
Current maturities of long-term debt	$ 204		$ 413
Long-term debt	717		59,709
Maximum [Member]
Line of Credit Facility [Abstract]
Amount of letters of credit outstanding	10,999
Osborn [Member]
Line of Credit Facility [Abstract]
Amount of credit facility	6,266
Borrowings outstanding	$ 0
Interest rate at period end	10.00%
Unused facility fee as a percentage of line of credit	0.75%
Performance bank guarantee, subsidiary obligation to fulfill contracts	$ 894
Under utilized facility resulting in unused facility fee	50.00%
Available credit under the facility	$ 5,372
Differential rate (less than prime rate)	0.25%
Astec Brazil Working Capital Loans [Member]
Debt [Abstract]
Loan amount	$ 917
Debt instrument, interest rate	10.40%
Debt instrument, maturity date	Apr. 30, 2024
Astec Brazil Equipment Financing [Member]
Debt [Abstract]
Loan amount	$ 4
Number of loans \| Loan	2
Term loan	5 years
Astec Brazil Equipment Financing [Member] \| Equipment Loan 1 [Member]
Debt [Abstract]
Debt instrument, interest rate	9.50%
Debt instrument, maturity date	Apr. 30, 2020
Astec Brazil Equipment Financing [Member] \| Equipment Loan 2 [Member]
Debt [Abstract]
Debt instrument, interest rate	16.30%
Debt instrument, maturity date	Apr. 30, 2020
Astec Brazil Working Capital Loans and Equipment Financing [Member]
Debt [Abstract]
Current maturities of long-term debt	$ 204
Long-term debt	$ 717
Wells Fargo [Member]
Line of Credit Facility [Abstract]
Maturity date	Dec. 29, 2023
Borrowings outstanding	$ 0		$ 58,778
Amount of letters of credit outstanding	8,640
Line of credit, additional borrowing capacity	$ 141,360
Interest rate at period end	2.80%
Wells Fargo [Member] \| Maximum [Member]
Line of Credit Facility [Abstract]
Amount of credit facility		$ 150,000		$ 100,000
Sub-limit for letters of credit				$ 30,000
Borrowings outstanding	$ 81,776
Wells Fargo [Member] \| Astec Brazil [Member]
Line of Credit Facility [Abstract]
Contingent liabilities for letters of credit issued on behalf of foreign subsidiaries	$ 3,200
Wells Fargo [Member] \| LIBOR [Member]
Line of Credit Facility [Abstract]
Term of variable rate	1 month
Additional rate over base, percentage	0.75%
Unused facility fee as a percentage of line of credit	0.125%