PGT Innovations (PGTI) 10-Q 8 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Apr. 04, 2015	6-May-15
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	4-Apr-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	PGTI
Entity Registrant Name	PGT, Inc.
Entity Central Index Key	1354327
Current Fiscal Year End Date	-1
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		47,747,539

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Income Statement [Abstract]
Net sales	$95,301	$62,724
Cost of sales	64,254	42,953
Gross profit	31,047	19,771
Selling, general and administrative expenses	17,664	13,377
Income from operations	13,383	6,394
Interest expense, net	2,913	898
Other expense, net	99	177
Income before income taxes	10,371	5,319
Income tax expense	3,719	1,967
Net income	6,652	3,352
Net income per common share:
Basic	$0.14	$0.07
Diluted	$0.13	$0.07
Weighted average shares outstanding:
Basic	47,721	47,150
Diluted	50,032	49,727
Comprehensive income	$6,685	$3,262

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Apr. 04, 2015	Jan. 03, 2015
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$48,742	$42,469
Accounts receivable, net	33,009	25,374
Inventories	21,271	19,970
Prepaid expenses and other current assets	5,284	6,464
Deferred income taxes	5,138	5,160
Total current assets	113,444	99,437
Property, plant and equipment, net	63,026	60,898
Trade name and other intangible assets, net	81,906	82,724
Goodwill	66,580	66,580
Other assets, net	2,002	2,110
Total assets	326,958	311,749
Current liabilities:
Accounts payable and accrued liabilities	25,123	17,328
Current portion of long-term debt	1,962	1,962
Total current liabilities	27,085	19,290
Long-term debt, less current portion	191,441	191,792
Deferred income taxes	25,956	25,956
Other liabilities	840	735
Total liabilities	245,322	237,773
Shareholders' equity:
Preferred stock; par value $.01 per share; 10,000 shares authorized; none outstanding
Common stock; par value $.01 per share; 200,000 shares authorized; 50,083 and 49,985 shares issued and 47,748 and 47,707 shares outstanding at April 4, 2015 and January 3, 2015, respectively	501	498
Additional paid-in-capital	238,167	238,229
Accumulated other comprehensive loss	-1,638	-1,671
Accumulated deficit	-145,357	-152,009
Shareholders' equity	91,673	85,047
Less: Treasury stock at cost	-10,037	-11,071
Total shareholders' equity	81,636	73,976
Total liabilities and shareholders' equity	$326,958	$311,749

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Apr. 04, 2015	Jan. 03, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value	$0.01	$0.01
Preferred stock, Shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.01	$0.01
Common stock, Shares authorized	200,000,000	200,000,000
Common stock, shares issued	50,083,000	49,985,000
Common stock, shares outstanding	47,748,000	47,707,000

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Cash flows from operating activities:
Net income	$6,652	$3,352
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,550	986
Amortization	818	428
Provision for (recovery of) allowance for doubtful accounts	22	-87
Stock-based compensation	474	245
Amortization of deferred financing costs	215	234
Derivative financial instruments	55	433
Deferred income taxes	22	429
Tax benefit on exercised stock options	-470	-1,538
Loss on disposal of assets	9
Change in operating assets and liabilities:
Accounts receivable	-7,907	-1,852
Inventories	-1,301	-2,417
Prepaid expenses and other current assets	192	486
Accounts payable, accrued and other liabilities	9,902	2,804
Net cash provided by operating activities	10,233	3,503
Cash flows from investing activities:
Purchases of property, plant and equipment	-3,952	-3,203
Net cash used in investing activities	-3,952	-3,203
Cash flows from financing activities:
Payments of long-term debt	-500	-1,000
Purchases of treasury stock	-4	-963
Proceeds from exercise of stock options	35	698
Tax benefit on exercised stock options	470	1,538
Other	-9
Net cash (used in) provided by financing activities	-8	273
Net increase in cash and cash equivalents	6,273	573
Cash and cash equivalents at beginning of period	42,469	30,204
Cash and cash equivalents at end of period	48,742	30,777
Non-cash activity:
Property, plant and equipment additions in accounts payable	$225

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Apr. 04, 2015
Accounting Policies [Abstract]
Basis of Presentation	NOTE 1. BASIS OF PRESENTATION
	The accompanying unaudited condensed consolidated financial statements include the accounts of PGT, Inc. and its wholly-owned subsidiary, PGT Industries, Inc., and its wholly-owned subsidiary CGI Window and Holdings, Inc. (collectively the “Company”), after elimination of intercompany accounts and transactions. These statements have been prepared in accordance with the instructions to Form 10-Q and do not include all of the information and footnotes required by United States Generally Accepted Accounting Principles (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the interim period are not necessarily indicative of the results that may be expected for the remainder of the current year or for any future periods. Each of our Company’s fiscal quarters ended April 4, 2015 and March 29, 2014, consisted of 13 weeks.
	The Condensed Consolidated Balance Sheet as of January 3, 2015, is derived from the audited consolidated financial statements, but does not include all disclosures required by GAAP. The Condensed Consolidated Balance Sheet as of January 3, 2015, and the unaudited condensed consolidated financial statements as of and for the period ended April 4, 2015, should be read in conjunction with the more detailed audited consolidated financial statements for the year ended January 3, 2015, included in the Company’s most recent Annual Report on Form 10-K. Accounting policies used in the preparation of these unaudited condensed consolidated financial statements are consistent with the accounting policies described in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K.
	Recently Adopted Accounting Pronouncements
	In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for reporting discontinued operations. Under the new guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of, or is classified as held for sale, and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. Major strategic shifts include disposals of a significant geographic area or line of business. The new standard allows an entity to have significant continuing involvement and cash flows with the discontinued operation. The standard requires expanded disclosures for discontinued operations and new disclosures for individually material disposal transactions that do not meet the definition of a discontinued operation. This new guidance is effective for annual reporting periods beginning on or after December 15, 2014, and interim periods within those annual periods, with early adoption permitted only for disposals (or classifications as held for sale) that have not been previously reported. The adoption of this standard did not have a significant impact on our consolidated financial statements.

Warranty

Warranty	3 Months Ended
	Apr. 04, 2015
Guarantees [Abstract]
Warranty	NOTE 2. WARRANTY
	Most of our manufactured products are sold with warranties. Warranty periods, which vary by product components, generally range from 1 to 10 years; however, the warranty period for a limited number of specifically identified components in certain applications is a lifetime. The majority of the products sold have warranties on components which range from 1 to 3 years. The reserve for warranties is based on management’s assessment of the cost per service call and the number of service calls expected to be incurred to satisfy warranty obligations on the current net sales.
	During the three months ended April 4, 2015, we recorded warranty expense at a rate of 2.00% of sales. This rate is higher than the 1.75% of sales accrued in the first three months of 2014, due to an increase in warranty claims experience.
	The following table summarizes: current period charges, adjustments to previous estimates, if necessary, as well as settlements, which represent actual costs incurred during the period for the three months ended April 4, 2015, and March 29, 2014. The reserve is determined through specific identification and assessing Company history. Expected future obligations are discounted to a current value using a risk-free rate for obligations with similar maturities.
	The following provides information with respect to our warranty accrual:
	Accrued Warranty	Beginning		Charged		Adjustments		Settlements			End of
		of Period		to Expense							Period
	(in thousands)
	Quarter ended April 4, 2015	$	3,302	$	1,908	$	189	$	(1,791	)	$	3,608
	Quarter ended March 29, 2014	$	2,666	$	1,098	$	90	$	(1,198	)	$	2,656

Inventories

Inventories	3 Months Ended
	Apr. 04, 2015
Inventory Disclosure [Abstract]
Inventories	NOTE 3. INVENTORIES
	Inventories consist principally of raw materials purchased for the manufacture of our products. We have limited finished goods inventory since all products are custom, made-to-order and usually ship upon completion. Finished goods inventory costs include direct materials, direct labor, and overhead. All inventories are stated at the lower of cost (first-in, first-out method) or market value. Inventories consisted of the following:
		April 4,		January 3,
		2015		2015
		(in thousands)
	Raw materials	$	17,768	$	16,674
	Work in progress		824		791
	Finished goods		2,679		2,505
		$	21,271	$	19,970

Stock_BasedCompensation

Stock Based-Compensation	3 Months Ended
	Apr. 04, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based-Compensation	NOTE 4. STOCK BASED-COMPENSATION
	Exercises
	For the three months ended April 4, 2015, there were 17,700 options exercised at a weighted average exercise price of $2.00 per share.
	Issuance
	On March 4, 2015, we granted 178,256 restricted stock awards to certain executives and non-executive employees of the Company. The restrictions on these stock awards lapse over time based solely on continued service. However, the quantity of restricted shares granted on half of these shares, or 89,128 shares, is fixed, whereas the quantity granted on the remaining half, or 89,128 shares, is subject to Company-specific performance criteria. The restricted stock awards have a fair value on date of grant of $10.95 per share based on the closing NASDAQ market price of the common stock on the day prior to day the awards were granted. Those restricted shares whose quantity is fixed vest in equal amounts over a three-year period on the first, second and third anniversary dates of the grant. Those restricted shares whose quantity is subject to Company performance criteria vest in equal amounts over a two-year period on the second and third anniversary dates of the grant.
	The performance criteria, as defined in the share awards, provides for a graded awarding of shares based on the percentage by which the Company meets earnings before interest and taxes, as defined, in our 2015 business plan. The performance percentages, ranging from less than 80% to greater than 120%, provide for the awarding of shares ranging from no shares to 150% of the original amount of shares.
	We record stock compensation expense over an award’s vesting period based on the award’s fair value at the date of grant. We recorded compensation expense for stock based awards of $0.5 million for the first quarter of 2015 and $0.2 million for the first quarter of 2014. As of April 4, 2015, and March 29, 2014, there was $2.7 million and $2.0 million, respectively, of total unrecognized compensation cost related to non-vested stock option agreements and restricted share awards. These costs are expected to be recognized in earnings on a straight-line basis over the weighted average remaining vesting period of 2.0 years at April 4, 2015, and 2.1 years at March 29, 2014.

Net_Income_Per_Common_Share

Net Income Per Common Share	3 Months Ended
	Apr. 04, 2015
Earnings Per Share [Abstract]
Net Income Per Common Share	NOTE 5. NET INCOME PER COMMON SHARE
	Basic EPS is computed by dividing net income available to common shareholders, by the weighted-average number of common shares outstanding during the period. Diluted EPS reflects the dilutive effect of potential common shares from securities such as stock options.
	Our weighted average shares outstanding for the three months ended April 4, 2015, and March 29, 2014, excludes underlying options and restricted stock awards of 20 thousand and 47 thousand, respectively, because their effects were anti-dilutive.
	The table below presents the calculation of EPS and a reconciliation of weighted average common shares used in the calculation of basic and diluted EPS for our Company:
		Three Months Ended
		April 4,		March 29,
		2015		2014
		(in thousands, except per
		share amounts)
	Net income	$	6,652	$	3,352
	Weighted-average common shares - Basic		47,721		47,150
	Add: Dilutive effect of stock compensation plans		2,311		2,577
	Weighted-average common shares - Diluted		50,032		49,727
	Net income per common share:
	Basic	$	0.14	$	0.07
	Diluted	$	0.13	$	0.07

Acquisition

Acquisition	3 Months Ended
	Apr. 04, 2015
Business Combinations [Abstract]
Acquisition	NOTE 6. ACQUISITION
	On September 22, 2014, we completed the acquisition of CGI which became a wholly-owned subsidiary of PGT, Inc. The purchase price paid in the transaction was $110.4 million, which was preliminarily allocated to the net assets acquired and liabilities assumed as of the acquisition date, in accordance with ASC 805, “Business Combinations”. There have been no adjustments to this preliminary allocation in the three months ended April 4, 2015. For discussion of this acquisition, see Note 4 in the Company’s Annual Report on Form 10-K for the year ended January 3, 2015.
	The following unaudited pro forma financial information assumes the acquisition had occurred at the beginning of the earliest period presented that does not include CGI’s actual results for the entire period. Pro forma results have been prepared by adjusting our historical results to include the results of CGI adjusted for the following: amortization expense related to the intangible assets arising from the acquisition and interest expense to reflect the 2014 Credit Agreement entered into in connection with the acquisition.
	The unaudited pro forma results below do not necessarily reflect the results of operations that would have resulted had the acquisition been completed at the beginning of the earliest periods presented, nor does it indicate the results of operations in future periods. The unaudited pro forma results do not include the impact of synergies, nor any potential impacts on current or future market conditions which could alter the following unaudited pro forma results.
		Quarter Ended
	Pro Forma Results (unaudited)	March 29,
		2014
	(in thousands, except per share amounts)
	Net sales	$	71,157
	Net income	$	3,502
	Net income per common share:
	Basic	$	0.07
	Diluted	$	0.07

Goodwill_Trade_Names_and_Other

Goodwill, Trade Names, and Other Intangible Assets	3 Months Ended
	Apr. 04, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Trade Names, and Other Intangible Assets	NOTE 7. GOODWILL, TRADE NAMES, AND OTHER INTANGIBLE ASSETS
	Goodwill, trade names, and other intangible assets, net, are as follows:
		April 4,			January 3,			Initial
		2015			2015			Useful Life
								(in years)
		(in thousands)
	Goodwill	$	66,580		$	66,580			indefinite
	Other intangible assets:
	Trade names	$	57,441		$	57,441			indefinite
	Customer relationships		79,700			79,700			10-Aug
	Developed technology		1,700			1,700			10
	Non-compete agreement		600			600			2
	Less: Accumulated amortization		(57,535	)		(56,717	)
	Subtotal		24,465			25,283
	Other intangible assets, net	$	81,906		$	82,724

LongTerm_Debt

Long-Term Debt	3 Months Ended
	Apr. 04, 2015
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 8. LONG-TERM DEBT
	On September 22, 2014, we entered into a Credit Agreement (the “2014 Credit Agreement”), among us, the lending institutions identified in the 2014 Credit Agreement, and Deutsche Bank AG New York Branch, as Administrative Agent and Collateral Agent. For further discussion of the significant terms of the 2014 Credit Agreement, see Note 8 in the Company’s Annual Report on Form 10-K for the year ended January 3, 2015. As of April 4, 2015, there were $0.5 million of letters of credit outstanding and $34.5 million available under the revolving credit portion of the 2014 Credit Agreement.
	The 2014 Credit Agreement contains a springing financial covenant, if we draw in excess of twenty percent (20%) of the revolving facility, which requires us to maintain a maximum total net leverage ratio (based on the ratio of total debt for borrowed money to trailing EBITDA, each as defined in the 2014 Credit Agreement), and is tested quarterly based on the last four fiscal quarters and is set at levels as described in the 2014 Credit Agreement. As of April 4, 2015, no such test is required as we have not exceeded 20% of our revolving capacity.
	The 2014 Credit Agreement also contains a number of affirmative and restrictive covenants, including limitations on the incurrence of additional debt, liens on property, acquisitions and investments, loans and guarantees, mergers, consolidations, liquidations and dissolutions, asset sales, dividends and other payments in respect of our capital stock, prepayments of certain debt and transactions with affiliates. The 2014 Credit Agreement also contains customary events of default. As of April 4, 2015, we were in compliance with all affirmative and restrictive covenants.
	The face value of the debt as of April 4, 2015, was $199.0 million. Related debt issuance costs and the debt discount are being amortized to interest expense, net on the Condensed Consolidated Statements of Comprehensive Income over the term of the debt.
	The contractual future maturities of long-term debt outstanding as of April 4, 2015, are as follows (excluding unamortized debt discount and issuance costs):
		(in thousands)
	2015	$	1,500
	2016		2,000
	2017		2,000
	2018		2,000
	2019		2,000
	Thereafter		189,500
	Total	$	199,000

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	3 Months Ended
	Apr. 04, 2015
Equity [Abstract]
Accumulated Other Comprehensive Loss	NOTE 9. ACCUMULATED OTHER COMPREHENSIVE LOSS
	The following table shows the components of accumulated other comprehensive loss for the three months ended April 4, 2015, and March 29, 2014:
	(in thousands)	Aluminum
		Forward
		Contracts
	Balance at January 3, 2015	$	(1,671	)
	Amounts reclassified from accumulated other comprehensive loss		55
	Tax effect		(22	)
	Net current-period other comprehensive income		33
	Balance at April 4, 2015	$	(1,638	)
	(in thousands)	Aluminum			Interest			Total
		Forward			Swap
		Contracts
	Balance at December 28, 2013	$	(1,837	)	$	(386	)	$	(2,223	)
	Other comprehensive loss before reclassification		(97	)		(154	)		(251	)
	Amounts reclassified from accumulated other comprehensive loss		256			—			256
	Tax effect		(95	)		—			(95	)
	Net current-period other comprehensive income (loss)		64			(154	)		(90	)
	Balance at March 29, 2014	$	(1,773	)	$	(540	)	$	(2,313	)
	The following table shows the reclassification out of accumulated other comprehensive loss for the three months ended April 4, 2015, and March 29, 2014:
		Amounts Reclassified From
		Accumulated Other Comprehensive Loss
								Affected Line Item
								in Statement
								Where Net Income
								is Presented
		Three Months Ended
		April 4,			March 29,
		2015			2014
		Debit (Credit)
	Aluminum forward contracts - effective portion	$	55		$	256		Cost of sales
	Tax effect		(22	)		(95	)	Tax expense

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Apr. 04, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 10. COMMITMENTS AND CONTINGENCIES
	Litigation
	Our Company is a party to various legal proceedings in the ordinary course of business. Although the ultimate disposition of those proceedings cannot be predicted with certainty, management believes the outcome of any claim that is pending or threatened, either individually or in the aggregate, will not have a materially adverse effect on our operations, financial position or cash flows.

Income_Taxes

Income Taxes	3 Months Ended
	Apr. 04, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 11. INCOME TAXES
	Our income tax expense was $3.7 million for the first quarter of 2015, compared with $2.0 million for the first quarter of 2014. Our effective tax rate for the first quarter of 2015 was 35.9%, and was 37.0% for the first quarter of 2014. The effective tax rates in both periods were lower than our combined statutory federal and state tax rate of 38.8% as the result of the impact of the section 199 domestic manufacturing deduction.

Derivatives

Derivatives	3 Months Ended
	Apr. 04, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	NOTE 12. DERIVATIVES
	Derivative Financial Instruments – Aluminum Contracts
	We enter into aluminum forward contracts to hedge the fluctuations in the purchase price of aluminum extrusion we use in production. Our contracts are designated as cash flow hedges since they are highly effective in offsetting changes in the cash flows attributable to forecasted purchases of aluminum. For further discussion of our derivative financial instruments relating to aluminum contracts, see Note 9 in the Company’s Annual Report on Form 10-K for the year ended January 3, 2015.
	We maintain a $2.0 million line of credit with our commodities broker to cover the liability position of open contracts for the purchase of aluminum in the event that the price of aluminum falls. Should the price of aluminum fall to a level which causes our liability for open aluminum contracts to exceed $2.0 million, we are required to fund daily margin calls to cover the excess. As of April 4, 2015, no amounts were borrowed under this line of credit.
	At April 4, 2015, the fair value of our aluminum forward contracts was in a net liability position of $431 thousand. We had 12 outstanding forward contracts for the purchase of 4.4 million pounds of aluminum through December 2015, at an average price of $0.91 per pound, which excludes the Midwest premium, with maturity dates of between 1 months and 8 months. We assessed the risk of non-performance of the Company to these contracts and recorded a de minimis adjustment to fair value as of April 4, 2015.
	Although it is our intent to have our aluminum hedges qualify as highly effective for reporting purposes, for the three months ended April 4, 2015, all 12 outstanding contracts did not qualify as effective. Effectiveness of aluminum forward contracts is determined by comparing the change in the fair value of the forward contract to the change in the expected cash to be paid for the hedged item. The effective portion of the gain or loss on our aluminum forward contracts is reported as a component of accumulated other comprehensive loss and is reclassified into earnings in the same line item in the income statement as the hedged item in the same period or periods during which the transaction affects earnings. When a cash flow hedge becomes ineffective, and if the forecasted hedged transaction is still probable of occurrence, amounts previously recorded in accumulated other comprehensive loss remain in accumulated other comprehensive loss and are recognized in earnings in the period in which the hedged transaction affects earnings. The change in value of the aluminum forward contracts occurring after ineffectiveness is recognized in other expense, net, on the Condensed Consolidated Statements of Comprehensive Income, and totaled $99 thousand and $162 thousand for the three months ended April 4, 2015, and March 29, 2014, respectively. The amount of losses recognized in the “accumulated other comprehensive loss” line item in the accompanying Condensed Consolidated Balance Sheets (unaudited) as of April 4, 2015, that will be reclassified to earnings within the next three months, will be immaterial.
	Derivative Financial Instruments – Interest Rate Contract
	We have an interest rate cap agreement we entered into on September 16, 2013. It is a two-year agreement with a notional amount of $20.0 million; and was initially designated as a cash flow hedge to protect the variable rate debt from an increase in the floating, one-month LIBOR rate of greater than 0.50%. Upon entering into the 2014 Credit Agreement, effective on September 22, 2014 it was de-designated as a cash flow hedge and has since been marked-to-market in other expense, net, on the Condensed Consolidated Statements of Comprehensive Income, and were de minimus for the three months ended April 4, 2015, and March 29, 2014, respectively.
	The fair value of our derivatives are classified in the accompanying Condensed Consolidated Balance Sheets as follows (in thousands):
	Derivatives in a net asset (liability) position	Balance Sheet Location		April 4,				January 3,
				2015				2015
	Hedging instruments:
	Aluminum forward contracts	Accrued liabilities		$	(431	)		$	(491	)
	Interest rate cap	Other current assets			2				2
	Total hedging instruments			$	(429	)		$	(489	)
	The impact of the offsetting derivative instruments are depicted below (in thousands):
		As of April 4, 2015
														Gross Amounts not Offset
		Gross				Gross				Net				Financial				Cash		Net
		Amounts of				Amounts				Amounts of				Instruments				Collateral		Amount
		Recognized				Offset				Recognized								Received
		Assets								Assets
	Interest rate cap	$	2			$	—			$	2			$	—			$	—	$	2
														Gross Amounts not Offset
		Gross				Gross				Net				Financial				Cash		Net
		Amounts of				Amounts				Amounts of				Instruments				Collateral		Amount
		Recognized				Offset				Recognized								Pledged
		(Liabilities)								(Liabilities)
	Aluminum forward contracts	$	(431	)		$	—			$	(431	)		$	—			$	—	$	(431	)
		As of January 3, 2015
														Gross Amounts not Offset
		Gross				Gross				Net				Financial				Cash		Net
		Amounts of				Amounts				Amounts of				Instruments				Collateral		Amount
		Recognized				Offset				Recognized								Received
		Assets								Assets
	Interest rate cap	$	2			$	—			$	2			$	—			$	—	$	2
														Gross Amounts not Offset
		Gross				Gross				Net				Financial				Cash		Net
		Amounts of				Amounts				Amounts of				Instruments				Collateral		Amount
		Recognized				Offset				Recognized								Pledged
		(Liabilities)								(Liabilities)
	Aluminum forward contracts	$	(491	)		$	—			$	(491	)		$	—			$	—	$	(491	)
	The following represents the gains (losses) on derivative financial instruments for the three months ended April 4, 2015 and March 29, 2014, and their classifications within the accompanying condensed consolidated statements of comprehensive income (in thousands):
		Derivatives in Cash Flow Hedging Relationships
		Amount of Gain or								Location of Gain		Amount of Gain or
		(Loss) Recognized in								or (Loss)		(Loss) Reclassified
		OCI on Derivatives								Reclassified from		from Accumulated
		(Effective Portion)								Accumulated OCI		OCI into Income
										into Income		(Effective Portion)
										(Effective Portion)
		Three Months Ended										Three Months Ended
		April 4,				March 29,						April 4,				March 29,
		2015				2014						2015				2014
	Aluminum contracts	$	—			$	(97	)		Cost of sales		$	(55	)		$	(256	)
	Interest rate swap		—				(154	)					—				—
		$	—			$	(251	)				$	(55	)		$	(256	)
										Location of Gain		Amount of Gain or
										or (Loss)		(Loss) Recognized
										Recognized in		in Income on
										Income on		Derivatives
										Derivatives		(Ineffective
										(Ineffective Portion)		Portion)
												Three Months Ended
												April 4,				March 29,
2015												2014
Aluminum contracts									Other expense, net		$	(99	)		$	(162	)
											$	(99	)		$	(162	)

Fair_Value

Fair Value	3 Months Ended
	Apr. 04, 2015
Fair Value Disclosures [Abstract]
Fair Value	NOTE 13. FAIR VALUE
	Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A three-tier fair value hierarchy is used to prioritize the inputs used in measuring fair value. The hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The three levels of the fair value hierarchy are as follows:
	Level 1 Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
	Level 2 Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly.
	Level 3 Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.
	The accounting guidance concerning fair value allows us to elect to measure financial instruments at fair value and report the changes in fair value through the Condensed Consolidated Statements of Comprehensive Income. This election can only be made at certain specified dates and is irrevocable once made. We do not have a policy regarding specific assets or liabilities to elect to measure at fair value, but rather make the election on an instrument-by-instrument basis as they are acquired or incurred.
	Items Measured at Fair Value on a Recurring Basis
	The following assets and liabilities are measured in the Condensed Consolidated Balance Sheets at fair value on a recurring basis and are categorized in the table below based upon the lowest level of significant input to the valuation:
		Fair Value Measurements
		Assets (Liabilities)
	Description	April 4,			Quoted			Significant			Significant
		2015			Prices in			Other			Unobservable
					Active			Observable			Inputs
					Markets			Inputs			(Level 3)
					(Level 1)			(Level 2)
		(in thousands)
	Aluminum forward contracts	$	(431	)	$	—		$	(431	)	$	—
	Interest rate cap		2			—			2			—
		$	(429	)	$	—		$	(429	)	$	—
	Description	January 3,			Quoted			Significant			Significant
		2015			Prices in			Other			Unobservable
					Active			Observable			Inputs
					Markets			Inputs			(Level 3)
					(Level 1)			(Level 2)
		(in thousands)
	Aluminum forward contracts	$	(491	)	$	—		$	(491	)	$	—
	Interest rate cap		2			—			2			—
		$	(489	)	$	—		$	(489	)	$	—
	The following is a description of the methods and assumptions used to estimate the fair values of our assets and liabilities measured at fair value on a recurring basis, as well as the basis for classifying these assets and liabilities as Level 2.
	Aluminum forward contracts identical to those held by us trade on the London Metal Exchange (“LME”). The LME provides a transparent forum and is the world’s largest center for the trading of futures contracts for non-ferrous metals. The prices are used by the metals industry worldwide as the basis for contracts for the movement of physical material throughout the production cycle. Based on this high degree of volume and liquidity in the LME, we believe the valuation price at any measurement date for contracts with identical terms as to prompt date, trade date and trade price as those we hold at any time represents a contract’s exit price to be used for purposes of determining fair value.
	Interest rate cap and swap contracts identical to that held by us are sold by financial institutions. The valuation price at any measurement date for a contract with identical terms, exercise price, expiration date, settlement date, and notional quantities, as the one we hold, is used for determining the fair value.
	Fair Value of Financial Instruments
	The following table presents the carrying values and estimated fair values of financial assets and liabilities that are required to be recorded or disclosed at fair value at April 4, 2015, and January 3, 2015, respectively:
		April 4, 2015						January 3, 2015
		Carrying			Estimated			Carrying			Estimated
		Amount			Fair			Amount			Fair
					Value						Value
	Financial assets (liabilities)
	Cash and cash equivalents	$	48,742		$	48,742		$	42,469		$	42,469
	Accounts receivable, net	$	33,009		$	33,009		$	25,374		$	25,374
	Accounts payable and accrued liabilities	$	(25,123	)	$	(25,123	)	$	(17,328	)	$	(17,328	)
	Long-term debt (including current portion)	$	(193,403	)	$	(193,403	)	$	(193,754	)	$	(193,754	)
	The following provides a description of the methods and significant assumptions used in estimating the fair value of our financial instruments that are not measured at fair value on a recurring basis.
	Cash and cash equivalents — The estimated fair value of these financial instruments approximates their carrying amounts due to their highly liquid or short-term nature.
	Accounts receivable, net — The estimated fair value of these financial instruments approximates their carrying amounts due to their short-term nature.
	Accounts payable and accrued liabilities — The estimated fair value of these financial instruments approximate their carrying amounts due to their short-term nature.
	Debt — The estimated fair value of this debt is based on Level 2 inputs of debt with similar terms and characteristics.

Warranty_Tables

Warranty (Tables)	3 Months Ended
	Apr. 04, 2015
Guarantees [Abstract]
Information Regarding Warranty Accrual	The following provides information with respect to our warranty accrual:
	Accrued Warranty	Beginning		Charged		Adjustments		Settlements			End of
		of Period		to Expense							Period
	(in thousands)
	Quarter ended April 4, 2015	$	3,302	$	1,908	$	189	$	(1,791	)	$	3,608
	Quarter ended March 29, 2014	$	2,666	$	1,098	$	90	$	(1,198	)	$	2,656

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Apr. 04, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories consisted of the following:
		April 4,		January 3,
		2015		2015
		(in thousands)
	Raw materials	$	17,768	$	16,674
	Work in progress		824		791
	Finished goods		2,679		2,505
		$	21,271	$	19,970

Net_Income_Per_Common_Share_Ta

Net Income Per Common Share (Tables)	3 Months Ended
	Apr. 04, 2015
Earnings Per Share [Abstract]
Calculation of EPS and Reconciliation of Weighted Average Common Shares Used in Calculation of Basic and Diluted EPS	The table below presents the calculation of EPS and a reconciliation of weighted average common shares used in the calculation of basic and diluted EPS for our Company:
		Three Months Ended
		April 4,		March 29,
		2015		2014
		(in thousands, except per
		share amounts)
	Net income	$	6,652	$	3,352
	Weighted-average common shares - Basic		47,721		47,150
	Add: Dilutive effect of stock compensation plans		2,311		2,577
	Weighted-average common shares - Diluted		50,032		49,727
	Net income per common share:
	Basic	$	0.14	$	0.07
	Diluted	$	0.13	$	0.07

Acquisition_Tables

Acquisition (Tables)	3 Months Ended
	Apr. 04, 2015
Business Combinations [Abstract]
Summary of Unaudited Proforma Results	The unaudited pro forma results do not include the impact of synergies, nor any potential impacts on current or future market conditions which could alter the following unaudited pro forma results.
		Quarter Ended
	Pro Forma Results (unaudited)	March 29,
		2014
	(in thousands, except per share amounts)
	Net sales	$	71,157
	Net income	$	3,502
	Net income per common share:
	Basic	$	0.07
	Diluted	$	0.07

Goodwill_Trade_Names_and_Other1

Goodwill, Trade Names, and Other Intangible Assets (Tables)	3 Months Ended
	Apr. 04, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill, Trade Names and Other Intangible Assets Net	Goodwill, trade names, and other intangible assets, net, are as follows:
		April 4,			January 3,			Initial
		2015			2015			Useful Life
								(in years)
		(in thousands)
	Goodwill	$	66,580		$	66,580			indefinite
	Other intangible assets:
	Trade names	$	57,441		$	57,441			indefinite
	Customer relationships		79,700			79,700			10-Aug
	Developed technology		1,700			1,700			10
	Non-compete agreement		600			600			2
	Less: Accumulated amortization		(57,535	)		(56,717	)
	Subtotal		24,465			25,283
	Other intangible assets, net	$	81,906		$	82,724

LongTerm_Debt_Tables

Long-Term Debt (Tables)	3 Months Ended
	Apr. 04, 2015
Debt Disclosure [Abstract]
Contractual Future Maturities of Long-term Debt	The contractual future maturities of long-term debt outstanding as of April 4, 2015, are as follows (excluding unamortized debt discount and issuance costs):
		(in thousands)
	2015	$	1,500
	2016		2,000
	2017		2,000
	2018		2,000
	2019		2,000
	Thereafter		189,500
	Total	$	199,000

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Apr. 04, 2015
Equity [Abstract]
Components of Accumulated Other Comprehensive Loss	The following table shows the components of accumulated other comprehensive loss for the three months ended April 4, 2015, and March 29, 2014:
	(in thousands)	Aluminum
		Forward
		Contracts
	Balance at January 3, 2015	$	(1,671	)
	Amounts reclassified from accumulated other comprehensive loss		55
	Tax effect		(22	)
	Net current-period other comprehensive income		33
	Balance at April 4, 2015	$	(1,638	)
	(in thousands)	Aluminum			Interest			Total
		Forward			Swap
		Contracts
	Balance at December 28, 2013	$	(1,837	)	$	(386	)	$	(2,223	)
	Other comprehensive loss before reclassification		(97	)		(154	)		(251	)
	Amounts reclassified from accumulated other comprehensive loss		256			—			256
	Tax effect		(95	)		—			(95	)
	Net current-period other comprehensive income (loss)		64			(154	)		(90	)
	Balance at March 29, 2014	$	(1,773	)	$	(540	)	$	(2,313	)
Reclassification Out of Accumulated Other Comprehensive Loss	The following table shows the reclassification out of accumulated other comprehensive loss for the three months ended April 4, 2015, and March 29, 2014:
		Amounts Reclassified From
		Accumulated Other Comprehensive Loss
								Affected Line Item
								in Statement
								Where Net Income
								is Presented
		Three Months Ended
		April 4,			March 29,
		2015			2014
		Debit (Credit)
	Aluminum forward contracts - effective portion	$	55		$	256		Cost of sales
	Tax effect		(22	)		(95	)	Tax expense

Derivatives_Tables

Derivatives (Tables)	3 Months Ended
	Apr. 04, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Hedges and Interest Rate Cap	The fair value of our derivatives are classified in the accompanying Condensed Consolidated Balance Sheets as follows (in thousands):
					April 4,			January 3,
					2015			2015
	Derivatives in a net asset (liability) position		Balance Sheet Location
	Hedging instruments:
	Aluminum forward contracts		Accrued liabilities		$	(431	)	$	(491	)
	Interest rate cap		Other current assets			2			2
	Total hedging instruments				$	(429	)	$	(489	)
Schedule of Offsetting Derivative Instrument	The impact of the offsetting derivative instruments are depicted below (in thousands):
		As of April 4, 2015
												Gross Amounts not Offset
		Gross			Gross			Net				Financial				Cash		Net
		Amounts of			Amounts			Amounts of				Instruments				Collateral		Amount
		Recognized			Offset			Recognized								Received
		Assets						Assets
	Interest rate cap	$	2		$	—		$	2			$	—			$	—	$	2
												Gross Amounts not Offset
		Gross			Gross			Net				Financial				Cash		Net
		Amounts of			Amounts			Amounts of				Instruments				Collateral		Amount
		Recognized			Offset			Recognized								Pledged
		(Liabilities)						(Liabilities)
	Aluminum forward contracts	$	(431	)	$	—		$	(431	)		$	—			$	—	$	(431	)
		As of January 3, 2015
												Gross Amounts not Offset
		Gross			Gross			Net				Financial				Cash		Net
		Amounts of			Amounts			Amounts of				Instruments				Collateral		Amount
		Recognized			Offset			Recognized								Received
		Assets						Assets
	Interest rate cap	$	2		$	—		$	2			$	—			$	—	$	2
												Gross Amounts not Offset
		Gross			Gross			Net				Financial				Cash		Net
		Amounts of			Amounts			Amounts of				Instruments				Collateral		Amount
		Recognized			Offset			Recognized								Pledged
		(Liabilities)						(Liabilities)
	Aluminum forward contracts	$	(491	)	$	—		$	(491	)		$	—			$	—	$	(491	)
Gains (Losses) on Derivative Financial Instruments	The following represents the gains (losses) on derivative financial instruments for the three months ended April 4, 2015 and March 29, 2014, and their classifications within the accompanying condensed consolidated statements of comprehensive income (in thousands):
		Derivatives in Cash Flow Hedging Relationships
		Amount of Gain or						Location of Gain		Amount of Gain or
		(Loss) Recognized in						or (Loss)		(Loss) Reclassified
		OCI on Derivatives						Reclassified from		from Accumulated
		(Effective Portion)						Accumulated OCI		OCI into Income
								into Income		(Effective Portion)
								(Effective Portion)
		Three Months Ended								Three Months Ended
		April 4,			March 29,					April 4,				March 29,
		2015			2014					2015				2014
	Aluminum contracts	$	—		$	(97	)	Cost of sales		$	(55	)		$	(256	)
	Interest rate swap		—			(154	)				—				—
		$	—		$	(251	)			$	(55	)		$	(256	)
								Location of Gain		Amount of Gain or
								or (Loss)		(Loss) Recognized
								Recognized in		in Income on
								Income on		Derivatives
								Derivatives		(Ineffective
								(Ineffective Portion)		Portion)
										Three Months Ended
										April 4,				March 29,
										2015				2014
	Aluminum contracts							Other expense, net		$	(99	)		$	(162	)
										$	(99	)		$	(162	)

Fair_Value_Tables

Fair Value (Tables)	3 Months Ended
	Apr. 04, 2015
Fair Value Disclosures [Abstract]
Items Measured at Fair Value on a Recurring Basis	The following assets and liabilities are measured in the Condensed Consolidated Balance Sheets at fair value on a recurring basis and are categorized in the table below based upon the lowest level of significant input to the valuation:
		Fair Value Measurements
		Assets (Liabilities)
	Description	April 4,			Quoted			Significant			Significant
		2015			Prices in			Other			Unobservable
					Active			Observable			Inputs
					Markets			Inputs			(Level 3)
					(Level 1)			(Level 2)
		(in thousands)
	Aluminum forward contracts	$	(431	)	$	—		$	(431	)	$	—
	Interest rate cap		2			—			2			—
		$	(429	)	$	—		$	(429	)	$	—
	Description	January 3,			Quoted			Significant			Significant
		2015			Prices in			Other			Unobservable
					Active			Observable			Inputs
					Markets			Inputs			(Level 3)
					(Level 1)			(Level 2)
		(in thousands)
	Aluminum forward contracts	$	(491	)	$	—		$	(491	)	$	—
	Interest rate cap		2			—			2			—
		$	(489	)	$	—		$	(489	)	$	—
Fair Value of Financial Instruments	The following table presents the carrying values and estimated fair values of financial assets and liabilities that are required to be recorded or disclosed at fair value at April 4, 2015, and January 3, 2015, respectively:
		4-Apr-15						3-Jan-15
		Carrying			Estimated			Carrying			Estimated
		Amount			Fair			Amount			Fair
					Value						Value
	Financial assets (liabilities)
	Cash and cash equivalents	$	48,742		$	48,742		$	42,469		$	42,469
	Accounts receivable, net	$	33,009		$	33,009		$	25,374		$	25,374
	Accounts payable and accrued liabilities	$	(25,123	)	$	(25,123	)	$	(17,328	)	$	(17,328	)
	Long-term debt (including current portion)	$	(193,403	)	$	(193,403	)	$	(193,754	)	$	(193,754	)

Warranty_Additional_Informatio

Warranty - Additional Information (Detail)	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014
Standard Product Warranty [Line Items]
Warranty expense rates	2.00%	1.75%
Minimum [Member]
Standard Product Warranty [Line Items]
Warranty periods	1 year
Warranty period of the majority of products sold	1 year
Maximum [Member]
Standard Product Warranty [Line Items]
Warranty periods	10 years
Warranty period of the majority of products sold	3 years

Warranty_Information_Regarding

Warranty - Information Regarding Warranty Accrual (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Guarantees [Abstract]
Accrued Warranty, Beginning of Period	$3,302	$2,666
Accrued Warranty, Charged to Expense	1,908	1,098
Accrued Warranty, Adjustments	189	90
Accrued Warranty, Settlements	-1,791	-1,198
Accrued Warranty, End of Period	$3,608	$2,656

Inventories_Inventories_Detail

Inventories - Inventories (Detail) (USD $)	Apr. 04, 2015	Jan. 03, 2015
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$17,768	$16,674
Work in progress	824	791
Finished goods	2,679	2,505
Total inventory	$21,271	$19,970

Stock_BasedCompensation_Additi

Stock Based-Compensation - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Mar. 04, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options exercised	17,700
Weighted average exercise price of options exercised	$2
Compensation expense for stock based awards	$474,000	$245,000
Total unrecognized compensation cost related to non-vested stock option and restricted stock awards	$2,700,000	$2,000,000
Weighted average remaining vesting period	2 years	2 years 1 month 6 days
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance criteria defined in share awards	The performance percentages, ranging from less than 80% to greater than 120%, provide for the awarding of shares ranging from no shares to 150% of the original amount of shares.
Restricted Stock Award [Member] | Executives And Non-executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards			178,256
Fair value of common stock			$10.95
Fixed Criteria [Member] | Executives And Non-executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards			89,128
Options vesting period			3 years
Company Performance Criteria [Member] | Executives And Non-executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards			89,128
Options vesting period			2 years

Net_Income_Per_Common_Share_Ad

Net Income Per Common Share - Additional Information (Detail)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Earnings Per Share [Abstract]
Anti-dilutive options excluded from weighted average shares outstanding	20	47

Net_Income_Per_Common_Share_Ca

Net Income Per Common Share - Calculation of EPS and Reconciliation of Weighted Average Common Shares Used in Calculation of Basic and Diluted EPS (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Earnings Per Share [Abstract]
Net income	$6,652	$3,352
Weighted-average common shares - Basic	47,721	47,150
Add: Dilutive effect of stock compensation plans	2,311	2,577
Weighted-average common shares - Diluted	50,032	49,727
Net income per common share:
Basic	$0.14	$0.07
Diluted	$0.13	$0.07

Acquisition_Additional_Informa

Acquisition - Additional Information (Detail) (CGI [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Sep. 22, 2014
CGI [Member]
Business Acquisition [Line Items]
Acquisition of CGI, transaction value	$110.40

Acquisition_Summary_of_Unaudit

Acquisition - Summary of Unaudited Proforma Results (Detail) (CGI [Member], USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014
CGI [Member]
Business Acquisition [Line Items]
Net sales	$71,157
Net income	$3,502
Net income per common share:
Basic	$0.07
Diluted	$0.07

Goodwill_Trade_Names_and_Other2

Goodwill, Trade Names, and Other Intangible Assets - Schedule of Goodwill, Trade Names and Other Intangible Assets Net (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2015	Jan. 03, 2015
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$66,580	$66,580
Less: Accumulated amortization	-57,535	-56,717
Subtotal	24,465	25,283
Other intangible assets, net	81,906	82,724
Customer Relationships [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	79,700	79,700
Customer Relationships [Member] | Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	8 years
Customer Relationships [Member] | Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Initial Useful Life (in years)	10 years
Developed Technology [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	1,700	1,700
Initial Useful Life (in years)	10 years
Noncompete Agreements [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets	600	600
Initial Useful Life (in years)	2 years
Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Trade names	$57,441	$57,441

Long_Term_Debt_Additional_Info

Long Term Debt - Additional Information (Detail) (USD $)	Apr. 04, 2015
Line of Credit Facility [Line Items]
Letters of credit outstanding	$500,000
Revolving Credit Facility Percentage Margin Over Base Rate	20.00%
Face value of debt	199,000,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit available on revolver	$34,500,000

Long_Term_Debt_Contractual_Fut

Long Term Debt - Contractual Future Maturities of Long-Term Debt (Detail) (USD $)	Apr. 04, 2015
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
2015	$1,500
2016	2,000
2017	2,000
2018	2,000
2019	2,000
Thereafter	189,500
Total	$199,000

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Apr. 04, 2015	Jan. 03, 2015
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	($2,223)		($1,671)
Other comprehensive loss before reclassification	-251
Amounts reclassified from accumulated other comprehensive loss	256
Tax effect	-95
Net current-period other comprehensive income (loss)	-90
Ending Balance	-2,313	-1,638	-1,671
Aluminum Forward Contracts [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	-1,837	-1,671
Other comprehensive loss before reclassification	-97
Amounts reclassified from accumulated other comprehensive loss	256	55
Tax effect	-95	-22
Net current-period other comprehensive income (loss)	64	33
Ending Balance	-1,773	-1,638
Interest Rate Swap [Member]
Components of Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	-386
Other comprehensive loss before reclassification	-154
Net current-period other comprehensive income (loss)	-154
Ending Balance	($540)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss - Reclassification Out of Accumulated Other Comprehensive Loss (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$64,254	$42,953
Tax expense	3,719	1,967
Reclassification Out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax expense	-22	-95
Reclassification Out of Accumulated Other Comprehensive Income [Member] | Aluminum Forward Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$55	$256

Income_Taxes_Additional_inform

Income Taxes - Additional information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$3,719	$1,967
Effective tax rates	35.90%	37.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	38.80%	38.80%

Derivatives_Additional_Informa

Derivatives - Additional Information (Detail) (USD $)	3 Months Ended		0 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Sep. 16, 2013	Jan. 03, 2015
Other Expense, net [Member]
Derivative [Line Items]
Other expense, net	$99,000	$162,000
Aluminum Contracts [Member] | Other Expense, net [Member]
Derivative [Line Items]
Other expense, net	99,000	162,000
Interest Rate Caps [Member]
Derivative [Line Items]
Term of interest rate cap agreement			2 years
Derivative instrument LIBOR rate exemption, interest rate cap agreement			0.50%
Notional amount of interest rate swap agreement			20,000,000
Aluminum Forward Contracts [Member]
Derivative [Line Items]
Line of credit to cover the liability position of open contracts	2,000,000
Price of aluminum, maximum exposure	2,000,000
Amounts borrowed under line of credit	0
Derivative financial instruments, fair value of net liability	$431,000			$491,000
Number of outstanding forward contracts, liability	12
Purchase of aluminum commodity contracts	4,400,000
Aluminum commodity contracts, average price per pound	0.91
Aluminum commodity contracts, lower maturity date	1 month
Aluminum commodity contracts, upper maturity date	8 months

Derivatives_Fair_Value_of_Hedg

Derivatives - Fair Value of Hedges and Interest Rate Cap (Detail) (USD $)	Apr. 04, 2015	Jan. 03, 2015
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]
Total hedging instruments	($429)	($489)
Aluminum Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivatives in a net liability position	-431	-491
Aluminum Forward Contracts [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives in a net liability position	-431	-491
Interest Rate Caps [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives in a net asset position	$2	$2

Derivatives_Schedule_of_Offset

Derivatives - Schedule of Offsetting Derivative Instrument (Detail) (USD $)	Apr. 04, 2015	Jan. 03, 2015
In Thousands, unless otherwise specified
Derivative [Line Items]
Financial Instruments - Assets	$429	$489
Interest Rate Caps [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets	2	2
Gross Amounts offset in Balance Sheet - Assets	0	0
Net amounts of Assets Presented in Balance Sheet	2	2
Financial Instruments - Assets	0	0
Cash Collateral Received - Assets	0	0
Net Amount	2	2
Aluminum Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Liabilities	-431	-491
Gross Amounts offset in Balance Sheet - Liabilities	0	0
Net amounts of Liabilities Presented in Balance Sheet	-431	-491
Financial Instruments - Liabilities	0	0
Cash Collateral Pledged - Liabilities	0	0
Net Amount	($431)	($491)

Derivatives_Gains_Losses_on_De

Derivatives - Gains (Losses) on Derivative Financial Instruments (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Apr. 04, 2015	Mar. 29, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Recognized in OCI on Derivatives (Effective Portion)		($251)
Other Expense, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	-55	-256
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)	-99	-162
Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	-55	-256
Aluminum Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Recognized in OCI on Derivatives (Effective Portion)		-97
Aluminum Contracts [Member] | Other Expense, net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)	-99	-162
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Recognized in OCI on Derivatives (Effective Portion)		($154)

Fair_Value_Items_Measured_at_F

Fair Value - Items Measured at Fair Value on Recurring Basis (Detail) (USD $)	Apr. 04, 2015	Jan. 03, 2015
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments, net liability and assets	($429)	($489)
Aluminum Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments, net liability and assets	-431	-491
Interest Rate Caps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments, net liability and assets	2	2
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments, net liability and assets	-429	-489
Significant Other Observable Inputs (Level 2) [Member] | Aluminum Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments, net liability and assets	-431	-491
Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Caps [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments, net liability and assets	$2	$2

Fair_Value_Fair_Value_of_Finan

Fair Value - Fair Value of Financial Instruments (Detail) (USD $)	Apr. 04, 2015	Jan. 03, 2015	Mar. 29, 2014	Dec. 28, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$48,742	$42,469	$30,777	$30,204
Accounts receivable, net	33,009	25,374
Accounts payable and accrued liabilities	-25,123	-17,328
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	48,742	42,469
Accounts receivable, net	33,009	25,374
Accounts payable and accrued liabilities	-25,123	-17,328
Long-term debt (including current portion)	-193,403	-193,754
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	48,742	42,469
Accounts receivable, net	33,009	25,374
Accounts payable and accrued liabilities	-25,123	-17,328
Long-term debt (including current portion)	($193,403)	($193,754)