XML 39 R21.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Financial Instruments and Concentrations of Credit Risk | 12 Months Ended
--- | ---
Dec. 31, 2021
Financial Instruments and Concentrations of Credit Risk [Abstract] |
Financial Instruments and Concentrations of Credit Risk | Note 14. Financial Instruments and Concentrations of Credit Risk The following methods and assumptions were used to estimate the fair value of each class of financial instrument: Cash and cash equivalents, short-term investments, accounts receivable and payable: The carrying amounts approximate fair value because of the short maturities of these instruments. Short-term debt and other liabilities: The carrying amounts of short-term debt and other liabilities approximate fair value because of the short maturities of these instruments. Long-term debt: The fair value of the long-term debt of the Company is estimated based on the quoted market prices for that debt or similar debt and approximates the carrying amount. Forward exchange contracts: The fair value of forward exchange contracts (used for hedging purposes) is based on information derived from active markets. If appropriate, the Company would enter into forward exchange contracts to mitigate the impact of foreign exchange rate movements on the Company's operating results. It does not engage in speculation. Such foreign exchange contracts would offset losses and gains on the assets, liabilities and transactions being hedged. Credit risk: The Company provides credit to customers in the ordinary course of business. The Company’s customer base is diverse and includes customers located throughout the world. Credit risk results from the possibility that a loss may occur from the failure of another party to perform according to the terms of the contracts. The Company regularly monitors its credit risk exposures and takes steps to mitigate the likelihood of these exposures resulting in an actual loss. The Company's extension of credit is based on an evaluation of the customer's financial condition and collateral is generally not required. The Company's bad debt expense for the years ended December 31, 2021, 2020 and 2019 was $0.9 million, $2.6 million and $6.3 million, respectively.

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

X
- Definition The entire disclosure of methods and assumptions used to estimate the fair value of financial instruments, and the entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References No definition available. + Details
Name: | mtx_FinancialInstrumentsAndConcentrationsOfCreditRiskTextBlock
Namespace Prefix: | mtx_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration