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Convertible Notes, Long-Term Debt and Credit Facility Convertible Notes, Long-Term Debt and Credit Facility (Credit Facility) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 28, 2012
Debt Instrument [Line Items] |  |
Credit facility, financial covenant debt ratio upper range | 110.00% |
Credit facility, financial covenant debt ratio lower range | 100.00% |
Credit facility, covenant terms | The Credit Facility is secured by substantially all of the Company’s domestic personal property, including accounts receivable, inventory, equipment and other intangible assets. The Credit Facility contains customary representations, warranties, and both affirmative and negative covenants, including a financial covenant to maintain consolidated earnings before interest, taxes, depreciation and amortization (“EBITDA”) to debt ratio of 1.10 to 1.00 and an annual limit on capital expenditures of $20 million. The Credit Facility restricts the payment of cash dividends on common stock. In the event of default, PNC Bank may accelerate the maturity date of any outstanding amounts borrowed under the Credit Facility. |
Line of Credit [Member] |  |
Debt Instrument [Line Items] |  |
Annual limit on capital expenditures | $ 24 |
Revolving Credit Facility [Member] | Line of Credit [Member] |  |
Debt Instrument [Line Items] |  |
Maximum borrowing capacity | 50 |
Monthly facility fee | 0.25% |
Secured amount of credit facility | 47.2 |
Credit facility, interest rate description | The interest rate on advances varies based on the level of borrowings. Rates range (a) between PNC Bank's base lending rate plus 0.5% to 1.0% or (b) between the London Interbank Lending Rate (LIBOR) plus 1.5% to 2.0%. PNC Bank's base lending rate was 3.25% at December 31, 2012 and would have permitted borrowing at rates ranging between 3.75% and 4.25%. |
Revolving Credit Facility [Member] | Line of Credit [Member] | PNC Bank base lending rate [Member] |  |
Debt Instrument [Line Items] |  |
Base lending rate | 3.25% |
Permitted borrowing rate, minimum | 4.25% |
Permitted borrowing rate, maximum | 4.75% |
Revolving Credit Facility [Member] | Letter of Credit [Member] |  |
Debt Instrument [Line Items] |  |
Maximum borrowing capacity | 10 |
Term loan [Member] | Line of Credit [Member] |  |
Debt Instrument [Line Items] |  |
Amount borrowed |  | 25
Periodic prinicpal payments | $ 0.3 |
Credit facility, interest rate at period end | 4.75% |
Credit facility, interest rate description | The interest rate varies based on the level of borrowings under the revolving credit facility. Rates range (a) between PNC Bank's base lending rate plus 1.0% to 1.5% or (b) between the London Interbank Lending Rate (LIBOR) plus 2.0% to 2.5%. At December 31, 2012, the interest rate on the term loan was 4.25%. |
Minimum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | PNC Bank base lending rate [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 1.00% |
Minimum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | LIBOR [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 2.00% |
Minimum [Member] | Term loan [Member] | Line of Credit [Member] | PNC Bank base lending rate [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 1.50% |
Minimum [Member] | Term loan [Member] | Line of Credit [Member] | LIBOR [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 2.50% |
Maximum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | PNC Bank base lending rate [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 1.50% |
Maximum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | LIBOR [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 2.50% |
Maximum [Member] | Term loan [Member] | Line of Credit [Member] | PNC Bank base lending rate [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 2.00% |
Maximum [Member] | Term loan [Member] | Line of Credit [Member] | LIBOR [Member] |  |
Debt Instrument [Line Items] |  |
Credit facility, variable percentage rate spread | 3.00% |

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- Definition Description of the conditions for borrowing under the credit facility including the nature of any restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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