XML 47 R29.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Pension And Other Post-Retirement Benefits (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs | The components of net periodic benefit cost for our pension and other post-retirement benefit programs reflected in consolidated results are shown below:
| Pension Benefits |  | Other Post-Retirement Benefits
| Three Months Ended March 31, |  | Three Months Ended March 31,
(In Thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Service cost | $ | 72 |  |  | $ | 144 |  |  | $ | 11 |  |  | $ | 12 |
Interest cost | 3,365 |  |  | 3,312 |  |  | 85 |  |  | 84 |
Expected return on plan assets | (3,978 | ) |  | (4,407 | ) |  | — |  |  | — |
Amortization of prior service costs, gains or losses and net transition asset | 3,384 |  |  | 4,024 |  |  | (48 | ) |  | (40 | )
Net periodic benefit cost | $ | 2,843 |  |  | $ | 3,073 |  |  | $ | 48 |  |  | $ | 56 |

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