XML 33 R18.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Accrued Expenses and Other Current Liabilities | 12 Months Ended
--- | ---
Dec. 31, 2021
Payables and Accruals [Abstract] |
Accrued Expenses and Other Current Liabilities | Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following:
| December 31,
| 2021 |  | 2020
Accrued salaries, wages and related employee benefits | $ | 33,816 |  |  | $ | 30,214 |
Contingent consideration | 1,830 |  |  | 1,300 |
Accrued workers' compensation and health benefits | 3,994 |  |  | 3,948 |
Deferred revenues | 6,202 |  |  | 6,538 |
Right-of-use liability - Operating | 10,040 |  |  | 10,348 |
Pension accrual | 2,519 |  |  | 2,519 |
Other accrued expenses | 25,462 |  |  | 23,633 |
Total accrued expenses and other current liabilities | $ | 83,863 |  |  | $ | 78,500 |

X
- Definition The entire disclosure for accrued liabilities, deferred revenues, and the fair value of contingent consideration liabilities at the end of the reporting period. + References No definition available. + Details
Name: | mg_AccruedLiabilitiesDeferredRevenuesAndContingentConsiderationLiabilitiesCurrentDisclosureTextBlock
Namespace Prefix: | mg_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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