XML 82 R68.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Stock-Based Compensation - SAR Activity (Detail) - Stock Appreciation Rights [Member] - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Schedule Of Stock Appreciation Rights Activity [Line Items] |  |  |
SARs Outstanding, Beginning Balance | 238,476 | 278,116 | 275,450
Granted, SARs | 24,536 | 21,260 | 37,478
Exercised, SARs | (108,764) | (60,900) | (34,812)
Canceled, SARs | (2,229) | 0 | 0
Shares Outstanding, SARs, Ending Balance | 152,019 | 238,476 | 278,116
Outstanding, Weighted Average Grant Price Per Share, Beginning Balance | $ 19.26 | $ 13.45 | $ 9.79
Vested, SARs | 103,094 |  |
Granted, Weighted Average Grant Price Per Share | $ 77.70 | 56.59 | 35.38
Exercisable, SARs | 103,094 |  |
Exercised, Weighted Average Grant Price Per Share | $ 13.89 | 5.27 | 8.07
Canceled, Weighted Average Grant Price Per Share | 77.70 | 0 | 0
Outstanding, Weighted Average Grant Price Per Share, Ending Balance | 31.58 | $ 19.26 | $ 13.45
Vested, Weighted Average Grant Price Per Share | 18.14 |  |
Exercisable, Weighted Average Grant Price Per Share | $ 18.14 |  |
Weighted Average Remaining Contractual Life, Outstanding | 5 years 6 months |  |
Weighted Average Remaining Contractual Life, Vested | 4 years 1 month 6 days |  |
Weighted Average Remaining Contractual Life, Exercisable | 4 years 1 month 6 days |  |
Aggregate Intrinsic Value, Outstanding | $ 8,862,501 |  |
Aggregate Intrinsic Value, Vested | 7,396,470 |  |
Aggregate Intrinsic Value, Exercisable | $ 7,396,470 |  |

X
- Definition Schedule of stock appreciation rights activity. + References No definition available. + Details
Name: | trex_ScheduleOfStockAppreciationRightsActivityLineItems
Namespace Prefix: | trex_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of equity instruments other than options exercisable. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisable
Namespace Prefix: | trex_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share based compensation arrangement by share based payment award non options equity instruments canceled weighted average grant price. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsCanceledWeightedAverageGrantPrice
Namespace Prefix: | trex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award non options equity instruments exercisable weighted average grant price. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsExercisableWeightedAverageGrantPrice
Namespace Prefix: | trex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share based compensation arrangement by share based payment award non options equity instruments exercised weighted average grant price. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsExercisedWeightedAverageGrantPrice
Namespace Prefix: | trex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award non options equity instruments granted weighted average grant price. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsGrantedWeightedAverageGrantPrice
Namespace Prefix: | trex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award non options equity instruments outstanding weighted average grant price. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsOutstandingWeightedAverageGrantPrice
Namespace Prefix: | trex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share based compensation arrangement by share based payment award non options equity instruments vested weighted average grant price. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsEquityInstrumentsVestedWeightedAverageGrantPrice
Namespace Prefix: | trex_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share based compensation arrangement by share based payment award non options exercisable intrinsic value. + References No definition available. + Details
Name: | trex_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsExercisableIntrinsicValue
Namespace Prefix: | trex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of equity instruments other than options vested. + References No definition available. + Details
Name: | trex_SharebasedCompensationArrangementByShareBasedPaymentAwardNonoptionEquityInstrumentsVested
Namespace Prefix: | trex_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sharebased compensation arrangement by sharebased payment award non options exercisable weighted average remaining contractual term. + References No definition available. + Details
Name: | trex_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm
Namespace Prefix: | trex_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sharebased compensation arrangement by sharebased payment award non options vested and expected to vest outstanding weighted average remaining contractual term. + References No definition available. + Details
Name: | trex_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm
Namespace Prefix: | trex_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net number of non-option equity instruments granted to participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_StockAppreciationRightsSARSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |