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Business Segments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net Sales | $ 923,033 tg_NetSales | [1],[2] | $ 930,721 tg_NetSales | [1],[2] | $ 857,342 tg_NetSales | [1],[2]
Film Products |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net Sales | 578,687 tg_NetSales / us-gaap_StatementBusinessSegmentsAxis = tg_FilmProductsMember |  | 621,239 tg_NetSales / us-gaap_StatementBusinessSegmentsAxis = tg_FilmProductsMember |  | 611,877 tg_NetSales / us-gaap_StatementBusinessSegmentsAxis = tg_FilmProductsMember |
Film Products | The Procter And Gamble Company |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net Sales | $ 220,800 tg_NetSales / tg_SegmentSalesToCustomerAxis = tg_ProcterAndGambleCompanyMember / us-gaap_StatementBusinessSegmentsAxis = tg_FilmProductsMember |  | $ 261,900 tg_NetSales / tg_SegmentSalesToCustomerAxis = tg_ProcterAndGambleCompanyMember / us-gaap_StatementBusinessSegmentsAxis = tg_FilmProductsMember |  | $ 264,000 tg_NetSales / tg_SegmentSalesToCustomerAxis = tg_ProcterAndGambleCompanyMember / us-gaap_StatementBusinessSegmentsAxis = tg_FilmProductsMember |
[1] | The difference between total consolidated sales as reported in the consolidated statements of income and segment, geographic and product group net sales reported in this note is freight of $28.8 million in 2014, $28.6 million in 2013 and $24.8 million in 2012.
[2] | Information on exports and foreign operations are provided on the previous page. Cash and cash equivalents includes funds held in locations outside the U.S. of $40.5 million and $38.6 million at December 31, 2014 and 2013, respectively. Export sales relate almost entirely to Film Products. Operations outside the U.S. in The Netherlands, Hungary, China, Brazil and India also relate to Film Products. Sales from locations in The Netherlands and Hungary are primarily to customers located in Europe. Sales from locations in China (Guangzhou and Shanghai) are primarily to customers located in China, but also include other customers in Asia.

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