Sleep Number (SNBR) 10-Q 29 Oct 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 27, 2014
Document and Entity Information [Abstract]	'
Entity Registrant Name	'SELECT COMFORT CORP
Entity Central Index Key	'0000827187
Current Fiscal Year End Date	'--01-03
Entity Filer Category	'Large Accelerated Filer
Document Type	'10-Q
Document Period End Date	27-Sep-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q3
Amendment Flag	'false
Entity Common Stock, Shares Outstanding	53,289,000

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 27, 2014	Dec. 28, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$78,426	$58,223
Marketable debt securities – current	55,317	52,159
Accounts receivable, net of allowance for doubtful accounts of $641 and $425, respectively	29,154	14,979
Inventories	48,704	40,152
Prepaid expenses	9,250	9,216
Deferred income taxes	6,939	6,936
Other current assets	10,254	7,874
Total current assets	238,044	189,539
Non-current assets:	'	'
Marketable debt securities – non-current	43,376	34,632
Property and equipment, net	159,475	129,542
Goodwill and intangible assets, net	16,194	16,823
Deferred income taxes	9,249	4,943
Other assets	8,513	6,286
Total assets	474,851	381,765
Current liabilities:	'	'
Accounts payable	85,597	73,391
Customer prepayments	29,239	15,392
Accrued sales returns	14,406	9,433
Compensation and benefits	29,023	15,242
Taxes and withholding	26,540	12,517
Other current liabilities	15,579	11,207
Total current liabilities	200,384	137,182
Non-current liabilities:	'	'
Warranty liabilities	2,253	1,567
Other long-term liabilities	23,182	17,796
Total liabilities	225,819	156,545
Shareholders’ equity:	'	'
Undesignated preferred stock; 5,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.01 par value; 142,500 shares authorized, 53,289 and 54,901 shares issued and outstanding, respectively	533	549
Additional paid-in capital	0	5,382
Retained earnings	248,491	219,276
Accumulated other comprehensive income	8	13
Total shareholders’ equity	249,032	225,220
Total liabilities and shareholders’ equity	$474,851	$381,765

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 27, 2014	Dec. 28, 2013
In Thousands, except Per Share data, unless otherwise specified
Current assets:	'	'
Allowance for Doubtful Accounts Receivable, Current	$641	$425
Shareholders’ equity:	'	'
Undesignated preferred stock, shares authorized (in shares)	5,000	5,000
Undesignated preferred stock, shares issued (in shares)	0	0
Undesignated preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized (in shares)	142,500	142,500
Common stock, shares issued (in shares)	53,289	54,901
Common stock, shares outstanding (in shares)	53,289	54,901

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Income Statement [Abstract]	'	'	'	'
Net sales	$323,366	$263,689	$834,541	$729,317
Cost of sales	124,782	97,269	322,177	268,083
Gross profit	198,584	166,420	512,364	461,234
Operating expenses:	'	'	'	'
Sales and marketing	137,863	118,307	369,597	326,477
General and administrative	23,022	15,055	63,183	46,249
Research and development	2,353	2,359	5,725	7,475
Total operating expenses	163,238	135,721	438,505	380,201
Operating income	35,346	30,699	73,859	81,033
Other income, net	96	74	276	243
Income before income taxes	35,442	30,773	74,135	81,276
Income tax expense	11,888	10,514	25,108	27,620
Net income	$23,554	$20,259	$49,027	$53,656
Basic net income per share:	'	'	'	'
Net income per share – basic (in USD per share)	$0.44	$0.37	$0.91	$0.98
Weighted-average shares – basic (in shares)	53,271	54,854	53,677	54,992
Diluted net income per share:	'	'	'	'
Net income per share – diluted (in USD per share)	$0.44	$0.36	$0.90	$0.96
Weighted-average shares – diluted (in shares)	53,971	55,748	54,358	55,990

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$23,554	$20,259	$49,027	$53,656
Other comprehensive (loss) income – unrealized (loss) gain on available-for-sale marketable debt securities, net of income tax	-35	47	-5	2
Comprehensive income	$23,519	$20,306	$49,022	$53,658

Consolidated_Statement_of_Shar

Consolidated Statement of Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
In Thousands, unless otherwise specified
Balance at Dec. 28, 2013	$225,220	$549	$5,382	$219,276	$13
Balance (in shares) at Dec. 28, 2013	54,901	54,901	'	'	'
Net income	49,027	0	0	49,027	0
Other comprehensive loss:	'	'	'	'	'
Unrealized loss on available-for-sale marketable debt securities, net of tax	-5	0	0	0	-5
Exercise of common stock options	1,631	1	1,630	0	0
Exercise of common stock options (in shares)	'	124	'	'	'
Tax effect from stock-based compensation	345	0	345	0	0
Stock-based compensation	4,294	'	'	'	'
Stock-based compensation (in shares)	'	-87	'	'	'
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	'	-1	4,295	0	0
Repurchases of common stock	-31,480	-16	-11,652	-19,812	0
Repurchases of common stock (in shares)	'	-1,649	'	'	'
Balance at Sep. 27, 2014	$249,032	$533	$0	$248,491	$8
Balance (in shares) at Sep. 27, 2014	53,289	53,289	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013
Cash flows from operating activities:	'	'
Net income	$49,027	$53,656
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	29,579	22,199
Stock-based compensation	4,294	3,058
Net loss (gain) on disposals and impairments of assets	115	-10
Excess tax benefits from stock-based compensation	-754	-3,088
Deferred income taxes	-4,306	4,288
Changes in operating assets and liabilities, net of effect of acquisition:	'	'
Accounts receivable	-14,195	1,717
Inventories	-8,552	-5,069
Income taxes	9,883	7,114
Prepaid expenses and other assets	-4,146	-5,144
Accounts payable	27,359	11,029
Customer prepayments	13,847	97
Accrued compensation and benefits	17,318	-5,607
Other taxes and withholding	4,484	1,504
Warranty liabilities	953	-1,218
Other accruals and liabilities	10,929	5,556
Net cash provided by operating activities	135,835	90,082
Cash flows from investing activities:	'	'
Purchases of property and equipment	-58,377	-57,820
Investments in marketable debt securities	-58,403	-26,041
Proceeds from maturities of marketable debt securities	38,237	31,973
Increase in restricted cash	-500	0
Proceeds from sales of property and equipment	5	117
Acquisition of business	0	-15,500
Investment in non-marketable equity securities	0	-3,000
Net cash used in investing activities	-79,038	-70,271
Cash flows from financing activities:	'	'
Repurchases of common stock	-31,480	-32,054
Net decrease in short-term borrowings	-7,499	-4,567
Proceeds from issuance of common stock	1,631	7,108
Excess tax benefits from stock-based compensation	754	3,088
Net cash used in financing activities	-36,594	-26,425
Net increase (decrease) in cash and cash equivalents	20,203	-6,614
Cash and cash equivalents, at beginning of period	58,223	87,915
Cash and cash equivalents, at end of period	$78,426	$81,301

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 27, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	We prepared the condensed consolidated financial statements as of and for the three and nine months ended September 27, 2014 of Select Comfort Corporation and 100%-owned subsidiaries (“Select Comfort” or the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and they reflect, in the opinion of management, all normal recurring adjustments necessary to present fairly our financial position as of September 27, 2014, and December 28, 2013, and the consolidated results of operations and cash flows for the periods presented. Our historical and quarterly consolidated results of operations may not be indicative of the results that may be achieved for the full year or any future period.
	Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with our most recent audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 28, 2013 and other recent filings with the SEC.
	The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of sales, expenses and income taxes during the reporting period. Predicting future events is inherently an imprecise activity and, as such, requires the use of judgment. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in these estimates will be reflected in the financial statements in future periods. Our critical accounting policies consist of stock-based compensation, asset impairment charges, goodwill and indefinite-lived intangible assets, warranty liabilities and revenue recognition.
	The consolidated financial statements include the accounts of Select Comfort Corporation and our 100%-owned subsidiaries. All significant intra-entity balances and transactions have been eliminated in consolidation.
	New Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board issued a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. This new guidance is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. Accordingly, we will adopt this new guidance beginning in fiscal 2017. Companies may use either a full retrospective or a modified retrospective approach to adopt this new guidance and management is currently evaluating which transition approach to use. Management does not expect this new guidance to materially impact our consolidated results of operations, financial position or cash flows.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 27, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	The following tables set forth, by level within the fair value hierarchy, our financial assets that were accounted for at fair value on a recurring basis according to the valuation techniques we used to determine their fair value (in thousands):
		September 27, 2014
		Level 1		Level 2		Level 3		Total
	Marketable debt securities – current
	U.S. Treasury securities	$	17,516	$	—	$	—	$	17,516
	Corporate bonds	—		17,736		—		17,736
	U.S. Agency bonds	—		9,544		—		9,544
	Municipal bonds	—		5,526		—		5,526
	Commercial paper	—		4,995		—		4,995
		17,516		37,801		—		55,317
	Marketable debt securities – non-current
	U.S. Treasury securities	14,996		—		—		14,996
	Corporate bonds	—		15,242		—		15,242
	U.S. Agency bonds	—		10,019		—		10,019
	Municipal bonds	—		3,119		—		3,119
		14,996		28,380		—		43,376
		$	32,512	$	66,181	$	—	$	98,693
		December 28, 2013
		Level 1		Level 2		Level 3		Total
	Marketable debt securities – current
	U.S. Treasury securities	$	15,011	$	—	$	—	$	15,011
	Corporate bonds	—		20,300		—		20,300
	U.S. Agency bonds	—		12,025		—		12,025
	Municipal bonds	—		4,823		—		4,823
		15,011		37,148		—		52,159
	Marketable debt securities – non-current
	U.S. Treasury securities	8,978		—		—		8,978
	Corporate bonds	—		15,484		—		15,484
	U.S. Agency bonds	—		7,498		—		7,498
	Municipal bonds	—		2,672		—		2,672
		8,978		25,654		—		34,632
		$	23,989	$	62,802	$	—	$	86,791
	We did not have any transfers between Level 1 and Level 2 fair value measurements during the periods presented.
	At September 27, 2014 and December 28, 2013, we had $0.9 million and $1.1 million, respectively, of debt and equity securities that funded our deferred compensation plan and are classified in other assets in our condensed consolidated balance sheets. We also had corresponding deferred compensation plan liabilities of $0.9 million and $1.1 million at September 27, 2014 and December 28, 2013, respectively, which are included in other long-term liabilities in our condensed consolidated balance sheets. The majority of the debt and equity securities are Level 1 as they trade with sufficient frequency and volume to enable us to obtain pricing information on an ongoing basis. Unrealized gains/(losses) on the debt and equity securities offset those associated with the corresponding deferred compensation plan liabilities.

Investments

Investments	9 Months Ended
	Sep. 27, 2014
Investments [Abstract]	'
Investments	'
	Marketable Debt Securities
	Investments in marketable debt securities were comprised of the following (in thousands):
		September 27, 2014
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	U.S. Treasury securities	$	32,494	$	21	$	(3	)	$	32,512
	Corporate bonds	32,996		4		(22		)	32,978
	U.S. Agency bonds	19,568		8		(13		)	19,563
	Municipal bonds	8,625		20		—			8,645
	Commercial paper	4,996		—		(1		)	4,995
		$	98,679	$	53	$	(39	)	$	98,693
		December 28, 2013
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	U.S. Treasury securities	$	23,975	$	15	$	(1	)	$	23,989
	Corporate bonds	35,804		3		(23		)	35,784
	U.S. Agency bonds	19,517		10		(4		)	19,523
	Municipal bonds	7,474		23		(2		)	7,495
		$	86,770	$	51	$	(30	)	$	86,791
	Maturities of marketable debt securities were as follows (in thousands):
		September 27, 2014				December 28, 2013
		Amortized		Fair		Amortized			Fair
		Cost		Value		Cost			Value
	Marketable debt securities – current (due in less than one year)	$	55,290	$	55,317	$	52,122		$	52,159
	Marketable debt securities – non-current (due in one to two years)	43,389		43,376		34,648			34,632
		$	98,679	$	98,693	$	86,770		$	86,791
	During the three months ended September 27, 2014 and September 28, 2013, $14.6 million and $8.5 million, respectively, of marketable debt securities matured and were redeemed at face value. During the nine months ended September 27, 2014 and September 28, 2013, $38.1 million and $31.8 million, respectively, of marketable debt securities matured and were redeemed at face value. During the nine months ended September 27, 2014, there were no other-than-temporary declines in market value.
	Other Investments
	During 2013, we made a minority equity investment in one of our strategic product-development partners. The carrying value of this investment at September 27, 2014 and December 28, 2013 using the cost method is $4.5 million and is included in other assets on our condensed consolidated balance sheets.

Inventories

Inventories	9 Months Ended
	Sep. 27, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories
	Inventories consisted of the following (in thousands):
		September 27,		December 28,
		2014		2013
	Raw materials	$	10,013	$	7,118
	Work in progress	340		505
	Finished goods	38,351		32,529
		$	48,704	$	40,152

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 27, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	Goodwill and Indefinite-Lived Intangible Assets
	The following is a roll forward of goodwill and indefinite-lived trade name/trademarks (in thousands):
		Nine Months Ended				Nine Months Ended
		September 27, 2014				September 28, 2013
		Goodwill		Indefinite-Lived		Goodwill		Indefinite-Lived
				Trade Name/				Trade Name/
				Trademarks				Trademarks
	Beginning balance	$	8,963	$	1,396	$	2,850	$	—
	Comfortaire purchase(1)	—		—		6,113		1,396
	Ending balance	$	8,963	$	1,396	$	8,963	$	1,396
	(1) Comfortaire purchase includes goodwill and indefinite-lived trade name/trademarks resulting from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.
	Definite-Lived Intangible Assets
	The following table provides the gross carrying amount and related accumulated amortization of our definite-lived intangible assets (in thousands):
		September 27, 2014				December 28, 2013
		Gross Carrying		Accumulated		Gross Carrying		Accumulated
		Amount		Amortization		Amount		Amortization
	Developed technologies	$	5,231	$	1,220	$	5,231	$	850
	Customer relationships	2,413		589		2,413		330
	Trade names/trademarks	101		101		101		101
		$	7,745	$	1,910	$	7,745	$	1,281
	Amortization expense for definite-lived intangible assets was $0.2 million and $0.6 million, for the three and nine months ended September 27, 2014, respectively, and $0.2 million and $0.6 million, for the three and nine months ended September 28, 2013, respectively.

Credit_Agreement

Credit Agreement	9 Months Ended
	Sep. 27, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Our $20.0 million Credit Agreement (the “Credit Agreement”) with Wells Fargo Bank, National Association, as amended, is an unsecured revolving credit facility that matures on August 31, 2016. The Credit Agreement contains an accordion feature that allows us to increase the amount of the line from $20.0 million to up to $50.0 million in total availability, subject to lender approval.
	Any borrowings under the Credit Agreement will, at our request, be classified as either LIBOR Loans or Adjusted Base Rate (“ABR”) Loans (both as defined in the Credit Agreement). The rate of interest payable by us in respect of loans outstanding under the revolving credit facility is: (i) with respect to LIBOR Loans, the Adjusted LIBO Rate (as defined in the Credit Agreement) for the interest period then in effect, plus 1.25%; or (ii) with respect to ABR Loans, the ABR (as defined in the Credit Agreement) then in effect for the Daily One-Month LIBO Rate (as defined in the Credit Agreement), plus 1.50%, or the prime rate. We are subject to certain financial covenants under the Credit Agreement, including minimum tangible net worth, a requirement to maintain a minimum amount of cash, cash equivalents and marketable debt securities, and to maintain at the administrative agent cash, cash equivalents and marketable debt securities equal to the amount the lenders are committed to lend under the Credit Agreement.
	At both September 27, 2014, and December 28, 2013, $20.0 million was available under the Credit Agreement, we had no borrowings and we were in compliance with all financial covenants. We had no outstanding letters of credit as of September 27, 2014 or December 28, 2013.

Repurchase_of_Common_Stock

Repurchase of Common Stock	9 Months Ended
	Sep. 27, 2014
Repurchase of Common Stock [Abstract]	'
Repurchase of Common Stock	'
	Repurchase of Common Stock
	Repurchases of our common stock were as follows (in thousands):
		Three Months Ended				Nine Months Ended
		September 27, 2014		September 28, 2013		27-Sep-14		28-Sep-13
	Amount repurchased under Board-approved share repurchase program	$	10,010	$	10,008	$	30,032	$	30,027
	Amount repurchased in connection with the vesting of employee restricted stock grants	—		15		1,448		2,027
	Total amount repurchased	$	10,010	$	10,023	$	31,480	$	32,054
	Effective as of September 27, 2014, our Board of Directors ("Board") increased our total remaining share repurchase authorization to $250.0 million. There is no expiration date governing the period over which we can repurchase shares. Any repurchased shares are constructively retired and returned to an unissued status.
	The cost of stock repurchases is first charged to additional paid-in-capital. Once additional paid-in capital is reduced to zero, any additional amounts are charged to retained earnings.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 27, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	We compensate officers, directors and key employees with stock-based compensation under two stock plans approved by our shareholders in 2004 and 2010 and administered under the supervision of our Board. Compensation expense, net of estimated forfeitures, is recognized ratably over the vesting period.
	Stock-based compensation expense consisted of the following (in thousands):
		Three Months Ended						Nine Months Ended
		27-Sep-14			28-Sep-13			September 27, 2014			September 28, 2013
	Options	$	574		$	740		$	1,503		$	2,018
	Restricted shares	1,685			326			2,791			1,040
	Total stock-based compensation expense(1)	2,259			1,066			4,294			3,058
	Income tax benefit	(768		)	(366		)	(1,464		)	(1,049		)
	Total stock-based compensation expense, net of tax	$	1,491		$	700		$	2,830		$	2,009
	(1) The nine months ended September 27, 2014 includes a $1.2 million benefit related to a change in estimated forfeitures due to employee turnover during the three months ended March 29, 2014.

Employee_Benefits

Employee Benefits	9 Months Ended
	Sep. 27, 2014
Profit Sharing and 401 (k) Plan [Abstract]	'
Employee Benefits	'
	Employee Benefits
	Under our profit sharing and 401(k) plan, eligible employees may defer up to 50% of their compensation on a pre-tax basis, subject to Internal Revenue Service limitations. Each calendar quarter, we may make a discretionary contribution equal to a percentage of the employee’s contribution. During the three months ended September 27, 2014 and September 28, 2013 our contributions, net of forfeitures, were $0.9 million and $0.8 million, respectively. During the nine months ended September 27, 2014 and September 28, 2013 our contributions, net of forfeitures, were $2.7 million and $2.3 million, respectively.

Other_Income_Net

Other Income, Net	9 Months Ended
	Sep. 27, 2014
Other Income and Expenses [Abstract]	'
Other Income, Net	'
	Other Income, Net
	Other income, net, consisted of the following (in thousands):
		Three Months Ended						Nine Months Ended
		September 27,			September 28,			September 27,			September 28,
		2014			2013			2014			2013
	Interest income	$	106		$	88		$	306		$	284
	Interest expense	(10		)	(14		)	(30		)	(41		)
	Other income, net	$	96		$	74		$	276		$	243

Net_Income_Per_Common_Share

Net Income Per Common Share	9 Months Ended
	Sep. 27, 2014
Earnings Per Share [Abstract]	'
Net Income per Common Share	'
	Net Income per Common Share
	The following computations reconcile net income per share – basic with net income per share – diluted (in thousands, except per share amounts):
		Three Months Ended				Nine Months Ended
		September 27,		September 28,		September 27,		September 28,
		2014		2013		2014		2013
	Net income	$	23,554	$	20,259	$	49,027	$	53,656
	Reconciliation of weighted-average shares outstanding:
	Basic weighted-average shares outstanding	53,271		54,854		53,677		54,992
	Effect of dilutive securities:
	Options	383		531		368		589
	Restricted shares	317		363		313		409
	Diluted weighted-average shares outstanding	53,971		55,748		54,358		55,990
	Net income per share – basic	$	0.44	$	0.37	$	0.91	$	0.98
	Net income per share – diluted	$	0.44	$	0.36	$	0.9	$	0.96
	Additional potentially dilutive stock options totaling 0.7 million and 0.6 million for the three months ended September 27, 2014 and September 28, 2013, respectively, and 0.9 million and 1.3 million for the nine months ended September 27, 2014 and September 28, 2013, respectively, have been excluded from our diluted net income per share calculations because these securities’ exercise prices were anti-dilutive (e.g., greater than the average market price of our common stock).

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 27, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Sales Returns
	The accrued sales returns estimate is based on historical return rates, which are reasonably consistent from period to period, and is adjusted for any current trends as appropriate. If actual returns vary from expected rates, sales in future periods are adjusted.
	The activity in the sales returns liability account was as follows (in thousands):
		Nine Months Ended
		September 27,			September 28,
		2014			2013
	Balance at beginning of year	$	9,433		$	5,330
	Additions that reduce net sales	55,047			33,260
	Deductions from reserves	(50,074		)	(28,816		)
	Acquired sales return reserve(1)	—			98
	Balance at end of period	$	14,406		$	9,872
	(1) Acquired sales return reserve resulted from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.
	Warranty Liabilities
	We provide a 25-year limited warranty on our beds. The customer participates over the last 23 years of the warranty period by paying a portion of the retail value of replacement parts. The estimated warranty costs, which are expensed at the time of sale and included in cost of sales, are based on historical trends and warranty claims rates incurred by us and are adjusted for any current trends as appropriate. Actual warranty claim costs could differ from these estimates. We regularly assess and adjust the estimate of accrued warranty claims by updating claims rates for actual trends and projected claim costs.
	The activity in the accrued warranty liabilities account was as follows (in thousands):
		Nine Months Ended
		September 27,			September 28,
		2014			2013
	Balance at beginning of year	$	4,153		$	4,858
	Additions charged to costs and expenses for current-year sales	6,119			3,206
	Deductions from reserves	(5,434		)	(4,428		)
	Changes in liability for pre-existing warranties during the current year, including expirations	268			3
	Acquired warranty reserve(1)	—			532
	Balance at end of period	$	5,106		$	4,171
	(1) Acquired warranty reserve resulted from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.
	Legal Proceedings
	We are involved from time to time in various legal proceedings arising in the ordinary course of our business, including primarily commercial, product liability, employment and intellectual property claims. In accordance with generally accepted accounting principles in the United States, we record a liability in our consolidated financial statements with respect to any of these matters when it is both probable that a liability has been incurred and the amount of the liability can be reasonably estimated. With respect to currently pending legal proceedings, we have not established an estimated range of reasonably possible additional losses either because we believe that we have valid defenses to claims asserted against us or the proceeding has not advanced to a stage of discovery that would enable us to establish an estimate. We currently do not expect the outcome of these matters to have a material effect on our consolidated results of operations, financial position or cash flows. Litigation, however, is inherently unpredictable, and it is possible that the ultimate outcome of one or more claims asserted against us could adversely impact our consolidated results of operations, financial position or cash flows. We expense legal costs as incurred.
	On August 23, 2013, we filed a complaint in U.S. District Court in the District of Minnesota against Gentherm, Inc. seeking a declaratory judgment that Select Comfort be named as an assignee of certain patents asserted against Select Comfort by Gentherm or in the alternative that the asserted patents are not enforceable or are invalid or that Select Comfort and its products do not infringe any valid claim of the asserted patents. This complaint was filed after Gentherm asserted in a letter that Select Comfort’s recently introduced DualTemp™ layer product infringed certain patents owned by Gentherm. Subsequently, Gentherm filed counterclaims alleging infringement of its patents and seeking various legal and equitable remedies, including injunctive relief, treble damages and attorney’s fees. We believe the claims asserted by Gentherm are without merit, and we intend to vigorously pursue our claims and defend the claims asserted by Gentherm.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 27, 2014
Accounting Policies [Abstract]	'
Business and Basis of Presentation, Policy	'
	We prepared the condensed consolidated financial statements as of and for the three and nine months ended September 27, 2014 of Select Comfort Corporation and 100%-owned subsidiaries (“Select Comfort” or the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and they reflect, in the opinion of management, all normal recurring adjustments necessary to present fairly our financial position as of September 27, 2014, and December 28, 2013, and the consolidated results of operations and cash flows for the periods presented. Our historical and quarterly consolidated results of operations may not be indicative of the results that may be achieved for the full year or any future period.
	Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with our most recent audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 28, 2013 and other recent filings with the SEC.
Use of Estimates, Policy	'
	The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of sales, expenses and income taxes during the reporting period. Predicting future events is inherently an imprecise activity and, as such, requires the use of judgment. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in these estimates will be reflected in the financial statements in future periods. Our critical accounting policies consist of stock-based compensation, asset impairment charges, goodwill and indefinite-lived intangible assets, warranty liabilities and revenue recognition.
Consolidation, Policy	'
	The consolidated financial statements include the accounts of Select Comfort Corporation and our 100%-owned subsidiaries. All significant intra-entity balances and transactions have been eliminated in consolidation.
New Accounting Pronouncements, Policy	'
	In May 2014, the Financial Accounting Standards Board issued a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. This new guidance is effective for annual reporting periods beginning after December 15, 2016 and early adoption is not permitted. Accordingly, we will adopt this new guidance beginning in fiscal 2017. Companies may use either a full retrospective or a modified retrospective approach to adopt this new guidance and management is currently evaluating which transition approach to use. Management does not expect this new guidance to materially impact our consolidated results of operations, financial position or cash flows.
Stockholders' Equity, Policy	'
	There is no expiration date governing the period over which we can repurchase shares. Any repurchased shares are constructively retired and returned to an unissued status.
	The cost of stock repurchases is first charged to additional paid-in-capital. Once additional paid-in capital is reduced to zero, any additional amounts are charged to retained earnings.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 27, 2014
Fair Value Disclosures [Abstract]	'
Assets and Liabilities that are Measured at Fair Value on a Recurring Basis	'
	The following tables set forth, by level within the fair value hierarchy, our financial assets that were accounted for at fair value on a recurring basis according to the valuation techniques we used to determine their fair value (in thousands):
		September 27, 2014
		Level 1		Level 2		Level 3		Total
	Marketable debt securities – current
	U.S. Treasury securities	$	17,516	$	—	$	—	$	17,516
	Corporate bonds	—		17,736		—		17,736
	U.S. Agency bonds	—		9,544		—		9,544
	Municipal bonds	—		5,526		—		5,526
	Commercial paper	—		4,995		—		4,995
		17,516		37,801		—		55,317
	Marketable debt securities – non-current
	U.S. Treasury securities	14,996		—		—		14,996
	Corporate bonds	—		15,242		—		15,242
	U.S. Agency bonds	—		10,019		—		10,019
	Municipal bonds	—		3,119		—		3,119
		14,996		28,380		—		43,376
		$	32,512	$	66,181	$	—	$	98,693
		December 28, 2013
		Level 1		Level 2		Level 3		Total
	Marketable debt securities – current
	U.S. Treasury securities	$	15,011	$	—	$	—	$	15,011
	Corporate bonds	—		20,300		—		20,300
	U.S. Agency bonds	—		12,025		—		12,025
	Municipal bonds	—		4,823		—		4,823
		15,011		37,148		—		52,159
	Marketable debt securities – non-current
	U.S. Treasury securities	8,978		—		—		8,978
	Corporate bonds	—		15,484		—		15,484
	U.S. Agency bonds	—		7,498		—		7,498
	Municipal bonds	—		2,672		—		2,672
		8,978		25,654		—		34,632
		$	23,989	$	62,802	$	—	$	86,791

Investments_Tables

Investments (Tables)	9 Months Ended
	Sep. 27, 2014
Investments [Abstract]	'
Investments in marketable debt securities	'
	Investments in marketable debt securities were comprised of the following (in thousands):
		September 27, 2014
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	U.S. Treasury securities	$	32,494	$	21	$	(3	)	$	32,512
	Corporate bonds	32,996		4		(22		)	32,978
	U.S. Agency bonds	19,568		8		(13		)	19,563
	Municipal bonds	8,625		20		—			8,645
	Commercial paper	4,996		—		(1		)	4,995
		$	98,679	$	53	$	(39	)	$	98,693
		December 28, 2013
		Amortized		Unrealized		Unrealized			Fair
		Cost		Gains		Losses			Value
	U.S. Treasury securities	$	23,975	$	15	$	(1	)	$	23,989
	Corporate bonds	35,804		3		(23		)	35,784
	U.S. Agency bonds	19,517		10		(4		)	19,523
	Municipal bonds	7,474		23		(2		)	7,495
		$	86,770	$	51	$	(30	)	$	86,791
Maturities of marketable debt securities	'
	Maturities of marketable debt securities were as follows (in thousands):
		September 27, 2014				December 28, 2013
		Amortized		Fair		Amortized			Fair
		Cost		Value		Cost			Value
	Marketable debt securities – current (due in less than one year)	$	55,290	$	55,317	$	52,122		$	52,159
	Marketable debt securities – non-current (due in one to two years)	43,389		43,376		34,648			34,632
		$	98,679	$	98,693	$	86,770		$	86,791

Inventories_Tables

Inventories (Tables)	9 Months Ended
	Sep. 27, 2014
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories consisted of the following (in thousands):
		September 27,		December 28,
		2014		2013
	Raw materials	$	10,013	$	7,118
	Work in progress	340		505
	Finished goods	38,351		32,529
		$	48,704	$	40,152

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 27, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Indefinite-Lived Intangible Assets	'
	The following is a roll forward of goodwill and indefinite-lived trade name/trademarks (in thousands):
		Nine Months Ended				Nine Months Ended
		September 27, 2014				September 28, 2013
		Goodwill		Indefinite-Lived		Goodwill		Indefinite-Lived
				Trade Name/				Trade Name/
				Trademarks				Trademarks
	Beginning balance	$	8,963	$	1,396	$	2,850	$	—
	Comfortaire purchase(1)	—		—		6,113		1,396
	Ending balance	$	8,963	$	1,396	$	8,963	$	1,396
	(1) Comfortaire purchase includes goodwill and indefinite-lived trade name/trademarks resulting from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.
Definite-Lived Intangible Assets	'
	The following table provides the gross carrying amount and related accumulated amortization of our definite-lived intangible assets (in thousands):
		September 27, 2014				December 28, 2013
		Gross Carrying		Accumulated		Gross Carrying		Accumulated
		Amount		Amortization		Amount		Amortization
	Developed technologies	$	5,231	$	1,220	$	5,231	$	850
	Customer relationships	2,413		589		2,413		330
	Trade names/trademarks	101		101		101		101
		$	7,745	$	1,910	$	7,745	$	1,281

Repurchase_of_Common_Stock_Tab

Repurchase of Common Stock (Tables)	9 Months Ended
	Sep. 27, 2014
Repurchase of Common Stock [Abstract]	'
Repurchase of Common Stock	'
	Repurchases of our common stock were as follows (in thousands):
		Three Months Ended				Nine Months Ended
		September 27, 2014		September 28, 2013		27-Sep-14		28-Sep-13
	Amount repurchased under Board-approved share repurchase program	$	10,010	$	10,008	$	30,032	$	30,027
	Amount repurchased in connection with the vesting of employee restricted stock grants	—		15		1,448		2,027
	Total amount repurchased	$	10,010	$	10,023	$	31,480	$	32,054

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 27, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-based compensation expense consisted of the following (in thousands):
		Three Months Ended						Nine Months Ended
		27-Sep-14			28-Sep-13			September 27, 2014			September 28, 2013
	Options	$	574		$	740		$	1,503		$	2,018
	Restricted shares	1,685			326			2,791			1,040
	Total stock-based compensation expense(1)	2,259			1,066			4,294			3,058
	Income tax benefit	(768		)	(366		)	(1,464		)	(1,049		)
	Total stock-based compensation expense, net of tax	$	1,491		$	700		$	2,830		$	2,009
	(1) The nine months ended September 27, 2014 includes a $1.2 million benefit related to a change in estimated forfeitures due to employee turnover during the three months ended March 29, 2014.

Other_Income_Net_Tables

Other Income, Net (Tables)	9 Months Ended
	Sep. 27, 2014
Other Income and Expenses [Abstract]	'
Other Income, Net	'
	Other income, net, consisted of the following (in thousands):
		Three Months Ended						Nine Months Ended
		September 27,			September 28,			September 27,			September 28,
		2014			2013			2014			2013
	Interest income	$	106		$	88		$	306		$	284
	Interest expense	(10		)	(14		)	(30		)	(41		)
	Other income, net	$	96		$	74		$	276		$	243

Net_Income_Per_Common_Share_Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Sep. 27, 2014
Earnings Per Share [Abstract]	'
Net Income per Common Share	'
	The following computations reconcile net income per share – basic with net income per share – diluted (in thousands, except per share amounts):
		Three Months Ended				Nine Months Ended
		September 27,		September 28,		September 27,		September 28,
		2014		2013		2014		2013
	Net income	$	23,554	$	20,259	$	49,027	$	53,656
	Reconciliation of weighted-average shares outstanding:
	Basic weighted-average shares outstanding	53,271		54,854		53,677		54,992
	Effect of dilutive securities:
	Options	383		531		368		589
	Restricted shares	317		363		313		409
	Diluted weighted-average shares outstanding	53,971		55,748		54,358		55,990
	Net income per share – basic	$	0.44	$	0.37	$	0.91	$	0.98
	Net income per share – diluted	$	0.44	$	0.36	$	0.9	$	0.96

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 27, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Sales Returns	'
	The activity in the sales returns liability account was as follows (in thousands):
		Nine Months Ended
		September 27,			September 28,
		2014			2013
	Balance at beginning of year	$	9,433		$	5,330
	Additions that reduce net sales	55,047			33,260
	Deductions from reserves	(50,074		)	(28,816		)
	Acquired sales return reserve(1)	—			98
	Balance at end of period	$	14,406		$	9,872
	(1) Acquired sales return reserve resulted from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.
Warranty Liabilities	'
	The activity in the accrued warranty liabilities account was as follows (in thousands):
		Nine Months Ended
		September 27,			September 28,
		2014			2013
	Balance at beginning of year	$	4,153		$	4,858
	Additions charged to costs and expenses for current-year sales	6,119			3,206
	Deductions from reserves	(5,434		)	(4,428		)
	Changes in liability for pre-existing warranties during the current year, including expirations	268			3
	Acquired warranty reserve(1)	—			532
	Balance at end of period	$	5,106		$	4,171
	(1) Acquired warranty reserve resulted from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Recurring [Member], USD $)	Sep. 27, 2014	Dec. 28, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	$55,317,000	$52,159,000
Marketable debt securities - noncurrent	43,376,000	34,632,000
Marketable debt securities	98,693,000	86,791,000
Deferred compensation plan liability	900,000	1,100,000
Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	17,516,000	15,011,000
Marketable debt securities - noncurrent	14,996,000	8,978,000
Marketable debt securities	32,512,000	23,989,000
Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	37,801,000	37,148,000
Marketable debt securities - noncurrent	28,380,000	25,654,000
Marketable debt securities	66,181,000	62,802,000
Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
Marketable debt securities	0	0
Available-for-sale Securities [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable securities assets funding the deferred compensation plan	900,000	1,100,000
US Treasury Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	17,516,000	15,011,000
Marketable debt securities - noncurrent	14,996,000	8,978,000
US Treasury Securities [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	17,516,000	15,011,000
Marketable debt securities - noncurrent	14,996,000	8,978,000
US Treasury Securities [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
US Treasury Securities [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
Corporate bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	17,736,000	20,300,000
Marketable debt securities - noncurrent	15,242,000	15,484,000
Corporate bonds [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
Corporate bonds [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	17,736,000	20,300,000
Marketable debt securities - noncurrent	15,242,000	15,484,000
Corporate bonds [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
U.S. Agency bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	9,544,000	12,025,000
Marketable debt securities - noncurrent	10,019,000	7,498,000
U.S. Agency bonds [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
U.S. Agency bonds [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	9,544,000	12,025,000
Marketable debt securities - noncurrent	10,019,000	7,498,000
U.S. Agency bonds [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
Municipal bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	5,526,000	4,823,000
Marketable debt securities - noncurrent	3,119,000	2,672,000
Municipal bonds [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
Municipal bonds [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	5,526,000	4,823,000
Marketable debt securities - noncurrent	3,119,000	2,672,000
Municipal bonds [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	0
Marketable debt securities - noncurrent	0	0
Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	4,995,000	'
Commercial Paper [Member] | Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	0	'
Commercial Paper [Member] | Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	4,995,000	'
Commercial Paper [Member] | Level 3 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Marketable debt securities - current	$0	'

Investments_Marketable_Debt_Se

Investments - Marketable Debt Securities (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'	'
Proceeds from Sale and Maturity of Available-for-sale Securities	$14,600,000	$8,500,000	$38,100,000	$31,800,000	'
Investments of marketable debt securities [Abstract]	'	'	'	'	'
Amortized cost	98,679,000	'	98,679,000	'	86,770,000
Unrealized gains	53,000	'	53,000	'	51,000
Unrealized losses	-39,000	'	-39,000	'	-30,000
Fair value	98,693,000	'	98,693,000	'	86,791,000
Amortized Cost [Abstract]	'	'	'	'	'
Marketable debt securities - current (due in less than one year)	55,290,000	'	55,290,000	'	52,122,000
Marketable debt securities - non-current (due in one to two years)	43,389,000	'	43,389,000	'	34,648,000
Marketable debt securities Total Amortized Cost	98,679,000	'	98,679,000	'	86,770,000
Fair Value [Abstract]	'	'	'	'	'
Marketable debt securities - current (due in less than one year)	55,317,000	'	55,317,000	'	52,159,000
Marketable debt securities - non-current (due in one to two years)	43,376,000	'	43,376,000	'	34,632,000
Fair value	98,693,000	'	98,693,000	'	86,791,000
U.S. Treasury securities [Member]	'	'	'	'	'
Investments of marketable debt securities [Abstract]	'	'	'	'	'
Amortized cost	32,494,000	'	32,494,000	'	23,975,000
Unrealized gains	21,000	'	21,000	'	15,000
Unrealized losses	-3,000	'	-3,000	'	-1,000
Fair value	32,512,000	'	32,512,000	'	23,989,000
Amortized Cost [Abstract]	'	'	'	'	'
Marketable debt securities Total Amortized Cost	32,494,000	'	32,494,000	'	23,975,000
Fair Value [Abstract]	'	'	'	'	'
Fair value	32,512,000	'	32,512,000	'	23,989,000
Corporate bonds [Member]	'	'	'	'	'
Investments of marketable debt securities [Abstract]	'	'	'	'	'
Amortized cost	32,996,000	'	32,996,000	'	35,804,000
Unrealized gains	4,000	'	4,000	'	3,000
Unrealized losses	-22,000	'	-22,000	'	-23,000
Fair value	32,978,000	'	32,978,000	'	35,784,000
Amortized Cost [Abstract]	'	'	'	'	'
Marketable debt securities Total Amortized Cost	32,996,000	'	32,996,000	'	35,804,000
Fair Value [Abstract]	'	'	'	'	'
Fair value	32,978,000	'	32,978,000	'	35,784,000
U.S. Agency bonds [Member]	'	'	'	'	'
Investments of marketable debt securities [Abstract]	'	'	'	'	'
Amortized cost	19,568,000	'	19,568,000	'	19,517,000
Unrealized gains	8,000	'	8,000	'	10,000
Unrealized losses	-13,000	'	-13,000	'	-4,000
Fair value	19,563,000	'	19,563,000	'	19,523,000
Amortized Cost [Abstract]	'	'	'	'	'
Marketable debt securities Total Amortized Cost	19,568,000	'	19,568,000	'	19,517,000
Fair Value [Abstract]	'	'	'	'	'
Fair value	19,563,000	'	19,563,000	'	19,523,000
Municipal bonds [Member]	'	'	'	'	'
Investments of marketable debt securities [Abstract]	'	'	'	'	'
Amortized cost	8,625,000	'	8,625,000	'	7,474,000
Unrealized gains	20,000	'	20,000	'	23,000
Unrealized losses	0	'	0	'	-2,000
Fair value	8,645,000	'	8,645,000	'	7,495,000
Amortized Cost [Abstract]	'	'	'	'	'
Marketable debt securities Total Amortized Cost	8,625,000	'	8,625,000	'	7,474,000
Fair Value [Abstract]	'	'	'	'	'
Fair value	8,645,000	'	8,645,000	'	7,495,000
Commercial Paper [Member]	'	'	'	'	'
Investments of marketable debt securities [Abstract]	'	'	'	'	'
Amortized cost	4,996,000	'	4,996,000	'	'
Unrealized gains	0	'	0	'	'
Unrealized losses	-1,000	'	-1,000	'	'
Fair value	4,995,000	'	4,995,000	'	'
Amortized Cost [Abstract]	'	'	'	'	'
Marketable debt securities Total Amortized Cost	4,996,000	'	4,996,000	'	'
Fair Value [Abstract]	'	'	'	'	'
Fair value	$4,995,000	'	$4,995,000	'	'

Investments_Other_Investments_

Investments - Other Investments (Details) (USD $)	Sep. 27, 2014	Dec. 28, 2013
In Millions, unless otherwise specified
Investments - Other Investments (Details) [Abstract]	'	'
Cost Method Investments	$4.50	$4.50

Inventories_Details

Inventories (Details) (USD $)	Sep. 27, 2014	Dec. 28, 2013
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$10,013	$7,118
Work in progress	340	505
Finished goods	38,351	32,529
Inventories	$48,704	$40,152

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets Goodwill and Indefinite-Lived Intangible Assets (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013
Goodwill [Roll Forward]	'	'
Beginning balance	$8,963	$2,850
Comfortaire purchase	0	6,113	[1]
Ending balance	8,963	8,963
Indefinite-Lived Intangible Assets [Roll Forward]	'	'
Beginning balance	1,396	0
Indefinite-lived Intangible Assets Acquired	0	1,396	[1]
Ending balance	$1,396	$1,396
[1]	Comfortaire purchase includes goodwill and indefinite-lived trade name/trademarks resulting from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets Finite-Lived Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Amortization of Intangible Assets	$200,000	$200,000	$600,000	$600,000	'
Finite-Lived Intangible Assets	7,745,000	'	7,745,000	'	7,745,000
Finite-Lived Intangible Assets, Accumulated Amortization	1,910,000	'	1,910,000	'	1,281,000
Developed technologies [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Finite-Lived Intangible Assets	5,231,000	'	5,231,000	'	5,231,000
Finite-Lived Intangible Assets, Accumulated Amortization	1,220,000	'	1,220,000	'	850,000
Customer Relationships [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Finite-Lived Intangible Assets	2,413,000	'	2,413,000	'	2,413,000
Finite-Lived Intangible Assets, Accumulated Amortization	589,000	'	589,000	'	330,000
Trademarks and Trade Names [Member]	'	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Finite-Lived Intangible Assets	101,000	'	101,000	'	101,000
Finite-Lived Intangible Assets, Accumulated Amortization	$101,000	'	$101,000	'	$101,000

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets Amortization Expense (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Amortization of Intangible Assets	$0.20	$0.20	$0.60	$0.60

Credit_Agreement_Details

Credit Agreement (Details) (Amended Credit Facility, Wells Fargo Bank [Member], USD $)	9 Months Ended
	Sep. 27, 2014	Dec. 28, 2013
Amended Credit Facility, Wells Fargo Bank [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Current borrowing capacity	$20,000,000	'
Line of Credit Facility Amended Expiration Date	31-Aug-16	'
Maximum borrowing capacity	50,000,000	'
Adjusted LIBO Rate basis (in hundredths)	1.25%	'
Adjusted Base Rate - Daily One-Month LIBO Rate basis (in hundredths)	1.50%	'
Available remaining borrowing capacity	20,000,000	20,000,000
Outstanding letters of credit	$0	$0

Repurchase_of_Common_Stock_Det

Repurchase of Common Stock (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Repurchase of Common Stock [Abstract]	'	'	'	'
Amount repurchased under Board-approved share repurchase program	$10,010,000	$10,008,000	$30,032,000	$30,027,000
Stock Repurchase Acquired Through Tax Withholding Restricted Stock	0	15,000	1,448,000	2,027,000
Total amount repurchased	10,010,000	10,023,000	31,480,000	32,054,000
Remaining Authorized Amount, Stock Repurchase Program	$250,000,000	'	$250,000,000	'

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014		Sep. 28, 2013
			stock_plan
Number of stock plans approved by shareholders	'	'	2		'
Total stock-based compensation expense	$2,259,000	$1,066,000	$4,294,000	[1]	$3,058,000
Income tax benefit	-768,000	-366,000	-1,464,000		-1,049,000
Total stock-based compensation expense, net of tax	1,491,000	700,000	2,830,000		2,009,000
Employee Service Share-based Compensation, Expense (Benefit) of Change in Forfeiture Rate	'	'	-1,200,000		'
Stock Options [Member]	'	'	'		'
Total stock-based compensation expense	574,000	740,000	1,503,000		2,018,000
Time-Based Stock Awards And Performance Stock Awards [Member]	'	'	'		'
Total stock-based compensation expense	$1,685,000	$326,000	$2,791,000		$1,040,000
[1]	The nine months ended September 27, 2014 includes a $1.2 million benefit related to a change in estimated forfeitures due to employee turnover during the three months ended March 29, 2014.

Employee_Benefits_Details

Employee Benefits (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Profit Sharing and 401 (k) Plan [Abstract]	'	'	'	'
Employee compensation deferral (in hundredths)	'	'	50.00%	'
Employer contributions	$0.90	$0.80	$2.70	$2.30

Other_Income_Net_Details

Other Income, Net (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Other Income and Expenses [Abstract]	'	'	'	'
Interest income	$106	$88	$306	$284
Interest expense	-10	-14	-30	-41
Other income, net	$96	$74	$276	$243

Net_Income_per_Common_Share_De

Net Income per Common Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Reconciliation of Net Income per Common Share [Line Items]	'	'	'	'
Net income	$23,554	$20,259	$49,027	$53,656
Basic weighted-average shares outstanding	53,271,000	54,854,000	53,677,000	54,992,000
Diluted weighted-average shares outstanding	53,971,000	55,748,000	54,358,000	55,990,000
Net income per share – basic (in USD per share)	$0.44	$0.37	$0.91	$0.98
Net income per share – diluted (in USD per share)	$0.44	$0.36	$0.90	$0.96
Stock Options [Member]	'	'	'	'
Reconciliation of Net Income per Common Share [Line Items]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	700,000	600,000	900,000	1,300,000
Stock Options [Member]	'	'	'	'
Reconciliation of Net Income per Common Share [Line Items]	'	'	'	'
Effect of dilutive securities	383,000	531,000	368,000	589,000
Restricted Stock [Member]	'	'	'	'
Reconciliation of Net Income per Common Share [Line Items]	'	'	'	'
Effect of dilutive securities	317,000	363,000	313,000	409,000

Commitments_and_Contingencies_1

Commitments and Contingencies Sales Return Liability (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013
Sales return liability [Roll Forward]	'	'
Balance at beginning of year	$9,433	$5,330
Additions that reduce net sales	55,047	33,260
Deductions from reserves	-50,074	-28,816
Acquired sales return reserve(1)	0	98	[1]
Balance at end of period	$14,406	$9,872
[1]	Acquired sales return reserve resulted from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.

Commitments_and_Contingencies_2

Commitments and Contingencies Warranty Liabilities (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013
Commitments and Contingencies Disclosure [Abstract]	'	'
Limited warranty period (in years)	'25 years	'
Customer participation term (in years)	'23 years	'
Warranty Liabilities [Roll Forward]	'	'
Balance at beginning of year	$4,153	$4,858
Additions charged to costs and expenses for current-year sales	6,119	3,206
Deductions from reserves	-5,434	-4,428
Changes in liability for pre-existing warranties during the current year, including expirations	268	3
Acquired warranty reserve(1)	0	532	[1]
Balance at end of period	$5,106	$4,171
[1]	Acquired warranty reserve resulted from the acquisition of Comfortaire Corporation in the first quarter of fiscal 2013.