XML 130 R82.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Shareholder Rights Agreement (Narrative) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013
Warrants and Rights Note Disclosure [Abstract] |
Portion of shares each Right can buy | 0.01
Exercise price of participating cumulative preferred stock, per share | $ 150
Percentage of outstanding common stock shares to be acquired for exercise of rights (more than) | 20.00%
Additional Percentage of Common Stock Outstanding Required to Become an Acquired Person | 1.00%
Percentage of common stock ownership required in a tender offer for exercise of rights (or more than) | 20.00%
Percentage of Assets or Earning Power Sold or Transferred For Exercise of Rights | 50.00%
Share-Based Compensation Arrangement by Share-based Payment Award, Price Per RIght Redeemed by Board of DIrectors in Event Agreement is Not Approved | $ 0.01

X
- Definition Additional Percentage of Common Stock Outstanding Required to Become an Acquired Person + References No definition available. + Details
Name: | tg_AdditionalPercentageofCommonStockOutstandingRequiredtoBecomeanAcquiredPerson
Namespace Prefix: | tg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise Price of Participating Cumulative Preferred Stock, Per Share + References No definition available. + Details
Name: | tg_ExercisePriceOfParticipatingCumulativePreferredStockPerShare
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of Assets or Earning Power Sold or Transferred For Exercise of Rights + References No definition available. + Details
Name: | tg_PercentageofAssetsorEarningPowerSoldorTransferredForExerciseofRights
Namespace Prefix: | tg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of common stock ownership required in a tender offer for exercise of rights. + References No definition available. + Details
Name: | tg_PercentageOfCommonStockOwnershipRequiredInTenderOfferForExerciseOfRights
Namespace Prefix: | tg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of outstanding common stock shares to be acquired for exercise of rights. + References No definition available. + Details
Name: | tg_PercentageOfOutstandingCommonStockSharesToBeAcquiredForExerciseOfRights
Namespace Prefix: | tg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Portion of shares each Right can buy + References No definition available. + Details
Name: | tg_PortionOfSharesEachRightCanBuy
Namespace Prefix: | tg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-Based Compensation Arrangement by Share-based Payment Award, Price Per RIght Redeemed by Board of DIrectors in Event Agreement is Not Approved + References No definition available. + Details
Name: | tg_ShareBasedCompensationArrangementbySharebasedPaymentAwardPricePerRIghtRedeemedbyBoardofDIrectorsinEventAgreementisNotApproved
Namespace Prefix: | tg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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