XML 48 R34.htm IDEA: XBRL DOCUMENT
v3.21.2

Restructuring - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring expenses | $ 2,091,000 | $ (598,000) | $ 2,882,000 | $ 3,168,000
Manufacturing Footprint Rationalization |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring expenses | 8,946,000 | 8,946,000 |  |
Other restructuring costs | 488,000 | 16,000 | 652,000 | 16,000
Manufacturing Footprint Rationalization | Minimum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 16,000,000 |  | 16,000,000 |
Manufacturing Footprint Rationalization | Maximum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 19,000,000 |  | 19,000,000 |
Employee Separation Costs | Manufacturing Footprint Rationalization |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring expenses | 759,000 | (1,691,000) | 965,000 | (1,443,000)
Restructuring reserve accelerated depreciation | 97,000 | 200,000 | 192,000 | 442,000
Employee Separation Costs | Manufacturing Footprint Rationalization | Minimum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 6,500,000 |  | 6,500,000 |
Employee Separation Costs | Manufacturing Footprint Rationalization | Maximum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 7,500,000 |  | 7,500,000 |
Employee Separation Costs | Other Restructuring Activities |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring expenses | 747,000 | 860,000 | 1,073,000 | 3,914,000
Cash Expenditures | Manufacturing Footprint Rationalization | Minimum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 13,000,000 |  | 13,000,000 |
Cash Expenditures | Manufacturing Footprint Rationalization | Maximum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 16,000,000 |  | 16,000,000 |
Restructuring Capital Expenditures | Manufacturing Footprint Rationalization | Minimum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 3,500,000 |  | 3,500,000 |
Restructuring Capital Expenditures | Manufacturing Footprint Rationalization | Maximum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 4,500,000 |  | 4,500,000 |
Accelerated Depreciation and Impairment | Manufacturing Footprint Rationalization |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 3,000,000 |  | 3,000,000 |
Other Restructuring | Manufacturing Footprint Rationalization | Minimum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | 3,000,000 |  | 3,000,000 |
Other Restructuring | Manufacturing Footprint Rationalization | Maximum |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring and related cost expected total cost | $ 4,000,000 |  | $ 4,000,000 |
Other Restructuring | Other Restructuring Activities |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring expenses |  | $ 17,000 |  | $ 239,000

X
- Definition Restructuring reserve for accelerated depreciation + References No definition available. + Details
Name: | thrm_RestructuringReserveForAcceleratedDepreciation
Namespace Prefix: | thrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_OtherRestructuringCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringAndRelatedCostExpectedCost1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringPlanAxis=thrm_ManufacturingFootprintRationalizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=thrm_EmployeeSeparationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringPlanAxis=thrm_OtherRestructuringActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=thrm_RestructuringCashPaymentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=thrm_RestructuringCapitalExpendituresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=thrm_RestructuringAcceleratedDepreciationAndImpairmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=us-gaap_OtherRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |