XML 68 R48.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Summary Of Significant Accounting Policies (Schedule Of Stock Options Granted And Related Estimated Fair Value At Date Of Grant) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) | 0 | 181,476 | 184,700
Estimated weighted average fair value of options per share at date of grant: |  |  |
Total estimated fair value of stock options granted |  | $ 1,521 | $ 1,850
Officers |  |  |
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) |  | 87,820 | 94,400
Estimated weighted average fair value of options per share at date of grant: |  |  |
Estimated weighted average fair value of options per share at date of grant |  | $ 9.21 | $ 10.37
Management |  |  |
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) |  | 93,656 | 90,300
Estimated weighted average fair value of options per share at date of grant: |  |  |
Estimated weighted average fair value of options per share at date of grant |  | $ 7.60 | $ 9.65

X
- Definition Share based compensation arrangement by share based payment award estimated fair value of stock options granted + References No definition available. + Details
Name: | tg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEstimatedFairValueOfStockOptionsGranted
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_OfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=tg_OtherManagementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |