XML 57 R49.htm IDEA: XBRL DOCUMENT v3.25.3

Stock-Based Compensation - Summary of Stock-Based Compensation Grants (Detail)	9 Months Ended
	Sep. 30, 2025 $ / shares shares
Time Based Restricted Stock Units [Member]
Stock Awards Granted | shares	88,547
Weighted-Average Grant Price Per Share | $ / shares	$ 66.33
Performance Based Restricted Stock Units [Member]
Stock Awards Granted | shares	102,049
Weighted-Average Grant Price Per Share | $ / shares	$ 64.85
Stock appreciation rights [Member]
Stock Awards Granted | shares	46,126
Weighted-Average Grant Price Per Share | $ / shares	$ 66.67

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:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=trex_TimeBasedRestrictedStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=trex_PerformanceBasedRestrictedStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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