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Debt - Narrative (Details) £ in Thousands |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jun. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2020 EUR (€) | Sep. 30, 2019 EUR (€) | Sep. 30, 2014 GBP (£)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Finance lease liability | $ 10,235,000 | $ 3,631,000 | $ 10,235,000 |  |  |  |  |  | $ 10,235,000 | $ 3,631,000 |  |  |
Other debt | 10,707,000 | 395,000 | 10,707,000 |  |  |  |  |  | 10,707,000 | 395,000 |  |  |
Foreign currency translation adjustment, net of tax | 374,000 | 3,320,000 | 11,240,000 | $ (30,647,000) | $ 11,106,000 | $ 2,634,000 | $ 153,000 | $ (12,577,000) |  |  |  |  |
Foreign currency translation adjustment, tax | 121,000 | 1,077,000 |  |  |  |  |  |  |  |  |  |  |
Other current assets | 73,175,000 | 49,384,000 | 73,175,000 |  |  |  |  |  | 73,175,000 | 49,384,000 |  |  |
Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) expected to be recognized over the next 12 months | (2,234,000) |  | (2,234,000) |  |  |  |  |  | (2,234,000) |  |  |  |
Designated as Hedging Instrument | Interest rate swap contracts | Cash Flow Hedging |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gain (loss) on fair value of interest rate swaps, before tax |  |  |  |  |  |  |  |  | (6,269,000) | (534,000) |  |  |
Unrealized gain (loss) on fair value of interest rate swaps, after tax |  |  |  |  |  |  |  |  | (4,733,000) | (403,000) |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt costs | $ 2,879,000 | 3,284,000 | $ 2,879,000 |  |  |  |  |  | $ 2,879,000 | 3,284,000 |  |  |
Senior Notes | Matthews Europe GmbH & Co. KG |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average interest rate on outstanding borrowings (as a percent) | 1.40% |  | 1.40% |  |  |  |  |  | 1.40% |  | 1.40% |  |
Debt issued amount | $ 16,376,000 |  | $ 16,376,000 |  |  |  |  |  | $ 16,376,000 |  | € 15,000,000.0 |  |
March 2020 Debt Amendment |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt costs | 2,000,000 |  | 2,000,000 |  |  |  |  |  | 2,000,000 |  |  |  |
Senior Notes 2025 | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issued amount | $ 300,000,000 |  | $ 300,000,000 |  |  |  |  |  | $ 300,000,000 |  |  |  |
Fixed interest rate (as a percent) | 5.25% |  | 5.25% |  |  |  |  |  | 5.25% |  | 5.25% |  |
Securitization Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of borrowings available | $ 115,000,000 |  | $ 115,000,000 |  |  |  |  |  | $ 115,000,000 |  |  |  |
Outstanding borrowings | $ 85,270,000 | 93,950,000 | $ 85,270,000 |  |  |  |  |  | $ 85,270,000 | 93,950,000 |  |  |
Interest rate on facility (as a percent) | 0.91% |  | 0.91% |  |  | 3.15% |  |  | 0.91% |  | 0.91% |  |
Securitization Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee (as a percent) |  |  |  |  |  |  |  |  | 0.25% |  |  |  |
Securitization Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee (as a percent) |  |  |  |  |  |  |  |  | 0.35% |  |  |  |
Securitization Facility | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on borrowings (as a percent) |  |  |  |  |  |  |  |  | 0.75% |  |  |  |
Other Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average interest rate on outstanding borrowings (as a percent) | 2.14% |  | 2.14% |  |  | 5.81% |  |  | 2.14% |  | 2.14% |  |
Revolving Credit Facility | March 2020 Debt Amendment |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of borrowings available | $ 750,000,000 |  | $ 750,000,000 |  |  |  |  |  | $ 750,000,000 |  |  |  |
Maximum borrowing amount drawn In foreign currency | 350,000,000 |  | 350,000,000 |  |  |  |  |  | $ 350,000,000 |  |  |  |
Revolving Credit Facility | March 2020 Debt Amendment | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual commitment fee range on unused portion (as a percent) |  |  |  |  |  |  |  |  | 0.15% |  |  |  |
Revolving Credit Facility | March 2020 Debt Amendment | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Annual commitment fee range on unused portion (as a percent) |  |  |  |  |  |  |  |  | 0.30% |  |  |  |
Term Loan | March 2020 Debt Amendment |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of borrowings available | 35,000,000 |  | 35,000,000 |  |  |  |  |  | $ 35,000,000 |  |  |  |
Outstanding borrowings | 28,563,000 | 53,497,000 | 28,563,000 |  |  |  |  |  | $ 28,563,000 | 53,497,000 |  |  |
Term Loan | March 2020 Debt Amendment | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate during period (as a percent) |  |  |  |  |  |  |  |  | 1.50% |  |  |  |
Term Loan | March 2020 Debt Amendment | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on borrowings (as a percent) |  |  |  |  |  |  |  |  | 0.75% |  |  |  |
Term Loan | March 2020 Debt Amendment | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate on borrowings (as a percent) |  |  |  |  |  |  |  |  | 2.00% |  |  |  |
Domestic Revolving Credit Facility | March 2020 Debt Amendment |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum available for issuance of trade and standby letters of credit | $ 35,000,000 |  | $ 35,000,000 |  |  |  |  |  | $ 35,000,000 |  |  |  |
Weighted-average interest rate on outstanding borrowings (as a percent) | 2.44% |  | 2.44% |  |  | 2.75% |  |  | 2.44% |  | 2.44% |  |
Foreign Line of Credit | Credit Facility With European Bank |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of borrowings available | $ 39,304,000 |  | $ 39,304,000 |  |  |  |  |  | $ 39,304,000 |  | € 35,000,000.0 |  |
Outstanding borrowings | $ 13,617,000 | 14,024,000 | $ 13,617,000 |  |  |  |  |  | $ 13,617,000 | 14,024,000 | € 12,100,000 | € 12,800,000 |
Weighted-average interest rate on outstanding borrowings (as a percent) | 1.25% |  | 1.25% |  |  | 1.25% |  |  | 1.25% |  | 1.25% |  |
Letter of Credit |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets | $ 10,566,000 |  | $ 10,566,000 |  |  |  |  |  | $ 10,566,000 |  |  |  | £ 8,570
United States of America, Dollars | Domestic Revolving Credit Facility | March 2020 Debt Amendment |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings | 275,000,000 | 325,638,000 | 275,000,000 |  |  |  |  |  | 275,000,000 | 325,638,000 |  |  |
Euro Member Countries, Euro | Domestic Revolving Credit Facility | March 2020 Debt Amendment |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings | $ 140,371,000 | $ 136,470,000 | $ 140,371,000 |  |  |  |  |  | $ 140,371,000 | $ 136,470,000 | € 125,000,000.0 | € 125,000,000.0 |

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- Definition Amount of after tax unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective. + References No definition available. + Details
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- Definition The average effective interest rate during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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- Definition The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=120400017&loc=d3e572229-122910 + Details
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- Definition The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer. + References No definition available. + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
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- 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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- Definition Amount of current assets classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 + Details
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- Definition Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32262-110900 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30755-110894 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 + Details
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