XML 72 R54.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Other Income (Expense), Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Other Income and Expenses [Abstract] |  |  |  |
Other income (expense), net | $ 5,857 | $ 34,735 | $ 14,089 | $ 38,022
Other Nonoperating Income (Expense), Net - Other | $ 57 | $ 1,379 | $ 89 | $ 1,366

X
- Definition Other Nonoperating Income (Expense), Net - Other + References No definition available. + Details
Name: | tg_OtherNonoperatingIncomeExpenseNetOther
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration