Debt default increase in basis spread on interest rate.

No definition available.

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- Definition

Debt instrument solvency ratio.

+ References

No definition available.

+ Details

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- Definition

Line of credit facility right to increase commitment.

+ References

No definition available.

+ Details

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- Definition

Maximum consolidated leverage ratio.

+ References

No definition available.

+ Details

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- Definition

Maximum debt as proportion of earning before interest tax depreciation and amortization.

+ References

No definition available.

+ Details

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- Definition

Minimum fixed charge coverage ratio rate.

+ References

No definition available.

+ Details

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- Definition

The amount of amortization of deferred charges applied against earnings during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- 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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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

For an unclassified balance sheet, the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization.

+ References

+ Details

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- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- 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://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Debt - Additional Information (Detail)	3 Months Ended		6 Months Ended
Debt - Additional Information (Detail)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 EUR (€)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 EUR (€)	Dec. 31, 2014 USD ($)	Nov. 18, 2014 USD ($)	Aug. 27, 2013 USD ($)	Aug. 17, 2012 EUR (€)
Line of Credit Facility [Line Items]
Increased credit facility commitment for either revolving credit facility or term loan facility									$ 50,000,000
Unused credit availability under credit facility						$ 72,700,000		$ 71,500,000
Weighted average interest rate on outstanding borrowings					2.73%	2.73%	2.24%	2.24%
Maximum consolidated leverage ratio					3.25	3.25
Minimum fixed charge coverage ratio			1.25
Increased interest rate of loan due to default					2.00%	2.00%
Other expenses for credit agreement						$ 3,100,000
Capitalized deferred financing costs						500,000		$ 500,000
Unamortized debt discount						(1,551,000)		(1,796,000)
Amortization expense	$ 100,000	$ 200,000	$ 200,000	$ 300,000
Aarding Thermal Acoustics B.V. ("Aarding") [Member]
Line of Credit Facility [Line Items]
Facilities agreement, amount \| €											€ 10,500,000
Maximum debt as proportion of EBITDA											3.0
Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			0.50%
One-Month LIBOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.00%
Bank Overdrafts [Member] \| Aarding Thermal Acoustics B.V. ("Aarding") [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities					€ 3,100,000	$ 3,500,000	€ 0	0
Weighted average interest rate on outstanding borrowings					1.95%	1.95%
Facilities agreement, amount \| €											€ 3,500,000
Debt instrument variable interest rate description			Three months Euribor plus 195 basis points
Term Loan [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities										$ 65,000,000
Increased credit facility commitment for either revolving credit facility or term loan facility									35,000,000
Term Loan [Member] \| Met-Pro Corporation [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities										65,000,000
U.S. Dollar Revolving Loans [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities										70,500,000
Increased credit facility commitment for either revolving credit facility or term loan facility									$ 15,000,000
U.S. Dollar Revolving Loans [Member] \| Met-Pro Corporation [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities										52,000,000
Multi-currency Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities										$ 19,500,000
Letters of Credit [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities						$ 8,300,000		9,500,000
Bank Guarantees [Member] \| Aarding Thermal Acoustics B.V. ("Aarding") [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount outstanding under the credit facilities					€ 6,800,000	$ 7,500,000	€ 5,500,000	$ 6,700,000
Weighted average interest rate on outstanding borrowings					2.65%	2.65%
Facilities agreement, amount \| €											€ 7,000,000
Debt instrument variable interest rate description			Three months Euribor plus 265 basis points
Minimum [Member] \| Cross Currency Interest Rate Contract [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.50%
Minimum [Member] \| Aarding Thermal Acoustics B.V. ("Aarding") [Member]
Line of Credit Facility [Line Items]
Borrowers solvency ratio											30.00%
Minimum [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			0.50%
Maximum [Member] \| Cross Currency Interest Rate Contract [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			2.50%
Maximum [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.50%