XML 46 R35.htm IDEA: XBRL DOCUMENT v3.21.2

Leases (Tables)

9 Months Ended

Sep. 30, 2021

Leases [Abstract]

Schedule of Supplemental Balance Sheet Information

The Company’s Condensed Consolidated Balance Sheets include the following related to operating leases:

Leases						Classification						September 30, 2021						December 31, 2020
Assets
ROU assets						Other Assets						$	42,043					$	46,728
Liabilities
ROU - current						Accrued expenses and other current liabilities						$	9,871					$	10,348
ROU liability - long-term						Other long-term liabilities						33,691						37,689
Total ROU liabilities												$	43,562					$	48,037

Schedule of Components of Lease Costs and Other Information Related to Leases

The components of lease costs were as follows:

												Three months ended September 30,									Nine months ended September 30,
						Classification						2021						2020			2021						2020
Finance lease expense
Amortization of ROU assets						Depreciation and amortization						$	1,002					$	1,081		$	3,094					$	3,495
Interest on lease liabilities						Interest expense						177						207			550						650
Operating lease expense						Cost of revenue; Selling, general & administrative expenses						3,239						3,341			9,808						9,970
Short-term lease expense						Cost of revenue; Selling, general & administrative expenses						7						11			22						60
Variable lease expense						Cost of revenue; Selling, general & administrative expenses						532						(4)			1,956						441
Total												$	4,957					$	4,636		$	15,430					$	14,616

Additional information related to leases was as follows:

									Nine months ended September 30,
															2021						2020
Cash paid for amounts included in the measurement of lease liabilities for finance and operating leases
Finance - financing cash flows															$	3,032					$	3,078
Finance - operating cash flows															$	550					$	650
Operating - operating cash flows															$	9,870					$	9,819
ROU assets obtained in the exchange for lease liabilities
Finance leases															$	2,445					$	1,607
Operating leases															$	4,212					$	6,919
Weighted-average remaining lease term (in years)
Finance leases															5.5						5.9
Operating leases															5.3						5.9
Weighted-average discount rate
Finance leases															5.4		%				5.8		%
Operating leases															5.8		%				5.8		%

Schedule of Maturities of Operating Lease Liabilities

Maturities of lease liabilities as of September 30, 2021 were as follows:

			Finance						Operating
Remainder of 2021			$	2,023					$	3,165
2022			4,602						11,595
2023			3,711						10,111
2024			2,778						7,843
2025			1,185						5,554
Thereafter			991						12,484
Total			15,290						50,752
Less: Present value discount			1,179						7,190
Lease liability			$	14,111					$	43,562

Schedule of Maturities of Finance Lease Liabilities

Maturities of lease liabilities as of September 30, 2021 were as follows:

			Finance						Operating
Remainder of 2021			$	2,023					$	3,165
2022			4,602						11,595
2023			3,711						10,111
2024			2,778						7,843
2025			1,185						5,554
Thereafter			991						12,484
Total			15,290						50,752
Less: Present value discount			1,179						7,190
Lease liability			$	14,111					$	43,562

X

- Definition

Assets And Liabilities, Lessee

+ References

No definition available.

+ Details

Name:	mg_AssetsAndLiabilitiesLesseeTableTextBlock
Namespace Prefix:	mg_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

+ Details

Name:	us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

+ Details

Name:	us-gaap_LeaseCostTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_LeasesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration