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Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings (Deficit) [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2011 | $ 92,499 us-gaap_StockholdersEquity | $ 329 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 99,712 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (7,542)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Beginning Balance, Shares at Dec. 31, 2011 |  | 31,204,264 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Net income | 2,720 us-gaap_NetIncomeLoss |  |  | 2,720 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Employee stock purchase and option plans | 822 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 2 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 820 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Employee stock purchase and option plans, Shares |  | 469,104 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Shares withheld for taxes on share-based payment awards | (5,524)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation | 1 us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (5,525)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Shares withheld for taxes on share-based payment awards, Shares |  | (74,302)us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Stock-based compensation | 3,469 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  | 3,469 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Stock-based compensation, Shares |  | 298,430 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued upon conversion of notes |  | 11 trex_ParValueOfStockIssuedDuringPeriodUponConversionOfConvertibleNotes / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | (11)trex_ParValueOfStockIssuedDuringPeriodUponConversionOfConvertibleNotes / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Common stock issued upon conversion of notes, Shares |  | 2,123,490 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Ending Balance at Dec. 31, 2012 | 93,986 us-gaap_StockholdersEquity | 343 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 98,465 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (4,822)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Ending Balance, Shares at Dec. 31, 2012 |  | 34,020,986 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Net income | 34,598 us-gaap_NetIncomeLoss |  |  | 34,598 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Employee stock purchase and option plans | 4,032 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 3 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 4,029 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Employee stock purchase and option plans, Shares |  | 542,670 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Shares withheld for taxes on share-based payment awards | (6,277)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation |  | (6,277)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Shares withheld for taxes on share-based payment awards, Shares |  | (58,730)us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Stock-based compensation | 3,811 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  | 3,811 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Stock-based compensation, Shares |  | 93,198 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Excess tax benefits from stock compensation | 1,466 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet |  | 1,466 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Shares repurchased under our publicly announced share repurchase programs | (25,000)us-gaap_TreasuryStockValueAcquiredCostMethod |  |  |  | (25,000)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Shares repurchased under our publicly announced share repurchase programs, Shares |  | (1,122,510)us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 1,122,510 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Ending Balance at Dec. 31, 2013 | 106,616 us-gaap_StockholdersEquity | 346 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 101,494 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 29,776 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (25,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Ending Balance, Shares at Dec. 31, 2013 |  | 33,475,614 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 1,122,510 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Net income | 41,521 us-gaap_NetIncomeLoss |  |  | 41,521 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Employee stock purchase and option plans | 747 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 1 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 746 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Employee stock purchase and option plans, Shares |  | 133,133 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Shares withheld for taxes on share-based payment awards | (3,189)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation |  | (3,189)us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Shares withheld for taxes on share-based payment awards, Shares |  | (36,610)us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Stock-based compensation | 4,807 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 1 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 4,806 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Stock-based compensation, Shares |  | 105,905 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Excess tax benefits from stock compensation | 12,883 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet |  | 12,883 us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |
Shares repurchased under our publicly announced share repurchase programs | (50,000)us-gaap_TreasuryStockValueAcquiredCostMethod |  |  |  | (50,000)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Shares repurchased under our publicly announced share repurchase programs, Shares |  | (1,657,919)us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 1,657,919 us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Ending Balance at Dec. 31, 2014 | $ 113,385 us-gaap_StockholdersEquity | $ 348 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 116,740 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 71,297 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (75,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember
Ending Balance, Shares at Dec. 31, 2014 |  | 32,020,123 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  | 2,780,429 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember

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- Definition This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415241&loc=d3e4534-113899 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11149-113907 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11178-113907 + Details
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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