XML 26 R57.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Shareholder Rights Agreement (Details) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 19, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Nov. 18, 2013
Warrants and Rights Note Disclosure [Abstract] |  |  |  |
Number of rights attached to each outstanding share of common stock |  |  |  | 1
Portion of shares each Right can buy |  | 0.01 | 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 |  | 20.00% |  |
Percentage of common stock ownership required in a tender offer for exercise of rights |  | 20.00% |  |
Additional percentage of common stock outstanding required to become an acquired person |  | 1.00% |  |
Percentage of assets or earning power sold or transferred for exercise of rights |  | 50.00% |  |
Price per rIght redeemed by board of dIrectors in event agreement is not approved | $ 0.01 |  |  |
Shareholder Rights Redemption Payment |  | $ 300,000 |  |

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 Class of Warrant or Right, Number of Rights Attached to Each Outstanding Share of Common Stock + References No definition available. + Details
Name: | tg_ClassofWarrantorRightNumberofRightsAttachedtoEachOutstandingShareofCommonStock
Namespace Prefix: | tg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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
- Definition Amount paid to shareholders to redeem shareholder rights per Shareholder Rights Agreement. + References No definition available. + Details
Name: | tg_ShareholderRightsRedemptionPayment
Namespace Prefix: | tg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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