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Debt - Long-Term Debt - (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 10, 2015 | Sep. 27, 2015 | Sep. 27, 2015 | Sep. 28, 2014 | Dec. 31, 2014
Long-term debt |  |  |  |  |
Revolving credit facility |  | $ 90,500,000 | $ 90,500,000 |  | $ 75,000,000
Revolving credit facility - terms |  |  |  |  |
Borrowings repaid on previous credit facility |  |  | 943,300,000 | $ 757,700,000 |
Amortization expenses |  | 61,000 | 165,000 |  |
Revolving credit facility due 2017 | Line of Credit |  |  |  |  |
Long-term debt |  |  |  |  |
Revolving credit facility |  |  |  |  | $ 75,000,000
Weighted-average interest rate |  |  |  |  | 1.50%
Amount available |  |  |  |  | $ 122,535,000
Total credit facility |  |  |  |  | 200,000,000
Standby letters of credit |  |  |  |  | $ 2,465,000
Commitment fee percentage per annum |  |  |  |  | 0.25%
Revolving credit facility due 2020 | Line of Credit |  |  |  |  |
Long-term debt |  |  |  |  |
Revolving credit facility |  | $ 90,500,000 | $ 90,500,000 |  |
Weighted-average interest rate |  | 1.50% | 1.50% |  |
Amount available |  | $ 107,185,000 | $ 107,185,000 |  |
Total credit facility | $ 200,000,000 | 200,000,000 | 200,000,000 |  |
Standby letters of credit |  | $ 2,315,000 | $ 2,315,000 |  |
Commitment fee percentage per annum |  |  | 0.30% |  |
Revolving credit facility - terms |  |  |  |  |
Term of credit agreement (in years) | 5 years |  |  |  |
Increase in maximum borrowing capacity subject to approval | $ 100,000,000 |  |  |  |
Revolving credit facility due 2020 | Line of Credit | Minimum |  |  |  |  |
Long-term debt |  |  |  |  |
Commitment fee percentage per annum | 0.20% |  |  |  |
Revolving credit facility due 2020 | Line of Credit | Maximum |  |  |  |  |
Long-term debt |  |  |  |  |
Commitment fee percentage per annum | 0.40% |  |  |  |
Swing line sublimit | Line of Credit |  |  |  |  |
Long-term debt |  |  |  |  |
Total credit facility | $ 15,000,000 |  |  |  |
Letter of credit sublimit | Line of Credit |  |  |  |  |
Long-term debt |  |  |  |  |
Total credit facility | $ 10,000,000 |  |  |  |

X
- Definition Increased maximum borrowing capacity under the credit facility if any one or more of the existing banks or new banks agree to provide such increased commitment amount. + References No definition available. + Details
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- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + 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 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 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: 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 + Details
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=28361426&loc=d3e1314-112600 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=28361426&loc=d3e1336-112600 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 + Details
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- Definition Weighted average interest rate of long-term debt outstanding. + References No definition available. + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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