XML 41 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Pension And Other Post-Retirement Benefits (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Pension And Other Post-Retirement Benefits [Abstract] |
Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs |
|  | Pension |  |  | Other Post-Retirement |
|  | Benefits for Three Months |  |  | Benefits for Three Months |
|  | Ended March 31 |  |  | Ended March 31 |
(In Thousands) |  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Service cost | $ | (870 | ) | $ | (858 | ) | $ | (18 | ) | $ | (13 | )
Interest cost |  | (3,106 | ) |  | (3,289 | ) |  | (89 | ) |  | (100 | )
Expected return on plan assets |  | 4,329 |  |  | 4,811 |  |  | - |  |  | - |
Amortization of prior service costs, gains or |  |  |  |  |  |  |  |  |  |  |  |
losses and net transition asset |  | (3,690 | ) |  | (2,626 | ) |  | 41 |  |  | 53 |
Net periodic benefit cost | $ | (3,337 | ) | $ | (1,962 | ) | $ | (66 | ) | $ | (60 | )

X
- Definition Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs [Table Text Block] + References No definition available. + Details
Name: | tg_ScheduleOfComponentsOfNetPeriodicBenefitCostForPensionAndOtherPostRetirementBenefitProgramsTableTextBlock
Namespace Prefix: | tg_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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