Unaudited Quarterly Financial Data - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 29, 2012
Quarterly Financial Information Disclosure [Abstract]
Increased estimated revenue reversed	$ 0.5
Increase net income	2.2
Deferred tax asset valuation allowance	3.9
Tax expense	$ 0.5

Deferred tax assets net before valuation allowance.

No definition available.

Name:	pgti_DeferredTaxAssetsNetBeforeValuationAllowance
Namespace Prefix:	pgti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant