XML 66 R55.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Schedule of Reclassification Adjustments and Other Activities Impacting Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |
Beginning Balance | $ (31,843) |  | $ (37,608) |  | $ (20,444) |  | $ (69,091)
Cumulative effect of accounting change due to adoption of ASU 2018-02 |  |  |  |  | (40) |  |
Other comprehensive income (loss) before reclassifications | (1,680) |  | 13,510 |  | (12,471) |  | 45,353
Income tax effect of other comprehensive income (loss) before reclassifications | (476) |  | (134) |  | (832) |  | (1,067)
Amounts reclassified from accumulated other comprehensive (income) loss into net income | 167 |  | (1,357) |  | 38 |  | (577)
Income taxes reclassified into net income | (45) |  | 366 |  | (128) |  | 159
Other comprehensive (loss) income, net of tax | (2,034) |  | 12,385 |  | (13,433) |  | 43,868
Ending Balance | (33,877) |  | (25,223) |  | (33,877) |  | (25,223)
Defined Benefit Pension Plans |  |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |
Beginning Balance | (2,406) |  | (2,550) |  | (2,366) |  | (2,550)
Cumulative effect of accounting change due to adoption of ASU 2018-02 |  |  |  |  | (40) |  |
Other comprehensive (loss) income, net of tax |  |  |  |  | (40) |  |
Ending Balance | (2,406) |  | (2,550) |  | (2,406) |  | (2,550)
Foreign Currency Translation Adjustments |  |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |
Beginning Balance | (29,040) |  | (37,071) |  | (17,555) |  | (65,762)
Other comprehensive income (loss) before reclassifications | (3,266) |  | 13,251 |  | (14,519) |  | 42,051
Income tax effect of other comprehensive income (loss) before reclassifications | 15 |  | (49) |  | (217) |  | (158)
Other comprehensive (loss) income, net of tax | (3,251) |  | 13,202 |  | (14,736) |  | 41,893
Ending Balance | (32,291) |  | (23,869) |  | (32,291) |  | (23,869)
Commodity Hedge Derivatives |  |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |
Beginning Balance |  |  | 272 |  | 277 |  | 241
Other comprehensive income (loss) before reclassifications |  |  | 153 |  |  |  | 231
Income tax effect of other comprehensive income (loss) before reclassifications |  |  | (56) |  |  |  | (84)
Amounts reclassified from accumulated other comprehensive (income) loss into net income |  |  | (17) | [1] | (218) | [1] | (47)
Income taxes reclassified into net income |  |  | 6 |  | (59) |  | 17
Other comprehensive (loss) income, net of tax |  |  | 86 |  | (277) |  | 117
Ending Balance |  |  | 358 |  |  |  | 358
Foreign Currency Hedge Derivatives |  |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |  |
Beginning Balance | (397) |  | 1,741 |  | (800) |  | (1,020)
Other comprehensive income (loss) before reclassifications | 1,586 |  | 106 |  | 2,048 |  | 3,071
Income tax effect of other comprehensive income (loss) before reclassifications | (491) |  | (29) |  | (615) |  | (825)
Amounts reclassified from accumulated other comprehensive (income) loss into net income | 167 | [1] | (1,340) | [1] | 256 | [1] | (530)
Income taxes reclassified into net income | (45) |  | 360 |  | (69) |  | 142
Other comprehensive (loss) income, net of tax | 1,217 |  | (903) |  | 1,620 |  | 1,858
Ending Balance | $ 820 |  | $ 838 |  | $ 820 |  | $ 838
[1] | The amounts reclassified from accumulated other comprehensive income (loss) are included in cost of sales.

X
- Definition Other comprehensive income loss cumulative effect of accounting change in period of adoption. + References No definition available. + Details
Name: | thrm_OtherComprehensiveIncomeLossCumulativeEffectOfAccountingChangeInPeriodOfAdoption
Namespace Prefix: | thrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_AccumulatedOtherComprehensiveIncomeLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580 + Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount before tax of reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17B -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL34724394-108580 + Details
Name: | us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL34724391-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324 + Details
Name: | us-gaap_ReclassificationFromAociCurrentPeriodTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedTranslationAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=thrm_AccumulatedCommodityHedgeDerivativesAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=thrm_AccumulatedForeignCurrencyHedgeDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |