XML 16 R55.htm IDEA: XBRL DOCUMENT
v3.19.3

INVESTMENTS - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract] |  |  |
Trading securities cost (in excess of) or below market value | $ 941 | $ 838 |
Maximum ownership interests in various entities recorded under the cost method | 20.00% |  |
Percentage of voting rights sold |  |  | 51.00%
Payments to equity-method investments | $ 29,148 |  |
Ownership interest recorded as cost method investment |  | 11,747 |
Proceeds from the sale of cost method investments |  | 9,159 |
Realized gain on disposition of cost method investment |  | $ 3,771 |

X
- Definition The maximum ownership interests in various entities, which are recorded under the cost method of accounting and are included in equity investments. + References No definition available. + Details
Name: | matw_MaximumOwnershipInterestsInVariousEntitiesRecordedUnderTheCostMethod
Namespace Prefix: | matw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Proceeds from Sale of Debt and Equity Securities, FV-NI, Held-for-investment + References No definition available. + Details
Name: | matw_ProceedsFromSaleOfDebtandEquitySecuritiesFVNIHeldForInvestment
Namespace Prefix: | matw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sale Of Subsidiary, Percentage Of Voting Rights Sold + References No definition available. + Details
Name: | matw_SaleOfSubsidiaryPercentageOfVotingRightsSold
Namespace Prefix: | matw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. + References No definition available. + Details
Name: | us-gaap_EquitySecuritiesFvNiCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of realized gain from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117546-209714 + Details
Name: | us-gaap_EquitySecuritiesFvNiRealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the net excess or deficiency of the fair value of an investment (security, contract) over or under its cost (face amount, notional amount), respectively, which excess value or deficiency has not been recognized in earnings of the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=50485924&loc=SL6090603-123010 + Details
Name: | us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciationDepreciationNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration