XML 48 R22.htm IDEA: XBRL DOCUMENT
v2.4.0.8

The Company and Subsequent Event - Additional Information (Detail) In Thousands, except Share data, unless otherwise specified | 1 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 22, 2013 USD ($) | Feb. 22, 2013 EUR (€) | Sep. 30, 2013 W.E.T. Bank of America credit facility USD ($) | Sep. 30, 2013 W.E.T. Bank of America credit facility EUR (€) | Oct. 31, 2013 W.E.T. Bank of America credit facility Subsequent Event EUR (€) | Sep. 30, 2013 W.E.T. Bank of America credit facility Minimum | Sep. 30, 2013 WET Historical Gentherm | Feb. 22, 2013 WET Historical Gentherm
Nature Of Company [Line Items] |  |  |  |  |  |  |  |
Business Acquisition, shares acquired |  |  |  |  |  |  | 309,537 | 442,253
Business Acquisition, percentage of shares acquired |  |  |  |  |  |  |  | 14.00%
Business Acquisition, shares issued for acquisition | 3,300,000 | 3,300,000 |  |  |  |  |  |
Business Acquisition, cash paid | $ 7,247 | € 5,408 | $ 26,311 | € 35,256 |  |  |  |
Business Acquisition, percentage of shares acquired |  |  |  |  | 100.00% | 99.00% |  |
Business Acquisition, purchase price per share |  |  |  | € 85 | € 90.05 |  |  |
Business Acquisition cost of acquisition, financed by borrowings |  |  | $ 40,441 |  |  |  |  |

X
- Definition Business Acquisition Cost of Acquired Entity Financed by Borrowings + References No definition available. + Details
Name: | thrm_BusinessAcquisitionCostOfAcquiredEntityFinancedByBorrowings
Namespace Prefix: | thrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business Acquisition Cost Of Acquired Entity Purchase Price Per Share + References No definition available. + Details
Name: | thrm_BusinessAcquisitionCostOfAcquiredEntityPurchasePricePerShare
Namespace Prefix: | thrm_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Business Acquisition, Number of Shares Acquired + References No definition available. + Details
Name: | thrm_BusinessAcquisitionNumberOfSharesAcquired
Namespace Prefix: | thrm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Business acquisition percentage of share. + References No definition available. + Details
Name: | thrm_BusinessAcquisitionPercentageOfShare
Namespace Prefix: | thrm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | thrm_NatureOfCompanyLineItems
Namespace Prefix: | thrm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration