XML 16 R54.htm IDEA: XBRL DOCUMENT v2.4.0.6

Employee Benefit Plans (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Benefit Plans (Textual) [Abstract]
Percentage of employee's contribution to the plan up to 6% of base salary matched by the Company	100.00%
Employer's contribution percentage	6.00%
Employer's contribution	$ 1.6	$ 1.6	$ 1.5

X

- Definition

Percentage of employee's contribution to the plan up to 6% of base salary matched by the Company.

+ References

No definition available.

+ Details

Name:	trex_DefinedContributionPlanEmployeeMatchingContributionPercent
Namespace Prefix:	trex_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	trex_EmployeeBenefitPlansTextualAbstract
Namespace Prefix:	trex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration