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Debt (Details) (USD $) | 1 Months Ended | 3 Months Ended |  |  | 3 Months Ended |  |  | 3 Months Ended |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2012 Agreement | Mar. 30, 2013 Agreement | Mar. 30, 2013 Term Loan Facility | Sep. 27, 2012 Term Loan Facility | Jul. 31, 2012 Term Loan Facility | Mar. 30, 2013 Term Loan Facility LIBOR | Mar. 30, 2013 Revolving Credit Facility | Jul. 31, 2012 Revolving Credit Facility | Mar. 30, 2013 Term loan facility and revolving credit facility, other than swingline loans LIBOR | Mar. 30, 2013 Term loan facility and revolving credit facility, other than swingline loans LIBOR Low end of range | Mar. 30, 2013 Term loan facility and revolving credit facility, other than swingline loans LIBOR High end of range | Mar. 30, 2013 Term loan facility and revolving credit facility, other than swingline loans Federal Funds | Mar. 30, 2013 Term loan facility and revolving credit facility, other than swingline loans Base rate | Mar. 30, 2013 Term loan facility and revolving credit facility, other than swingline loans one-month LIBOR | Mar. 30, 2013 Term loan facility, revolving credit facility, swingline and other loans Base rate | Mar. 30, 2013 Term loan facility, revolving credit facility, swingline and other loans Base rate Low end of range | Mar. 30, 2013 Term loan facility, revolving credit facility, swingline and other loans Base rate High end of range
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 230,000,000 |  |  |  | $ 100,000,000 |  |  | $ 130,000,000 |  |  |  |  |  |  |  |  |
Term of debt instrument | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amortization in each of the first two years |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for which the percentage of principal amortization is five percent |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amortization in each of the next three years |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years for which the percentage of principal amortization is ten percent |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sublimit on letters of credit |  |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |
Sublimit on swingline loan |  |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |
Additional increase in borrowing capacity of the line of credit available at the entity's option |  |  |  |  |  |  | 50,000,000 |  |  |  |  |  |  |  |  |  |
Amount borrowed under the term loan facility |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Base rate |  |  |  |  |  | LIBOR |  |  | LIBOR |  |  | Federal Funds rate | base rate | one-month LIBOR | base rate |  |
Interest rate added to the base rate (as a percent) |  |  |  |  |  |  |  |  |  | 1.50% | 2.50% | 0.50% |  | 1.00% |  | 0.50% | 1.50%
Maximum leverage ratio |  | 2.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum fixed charge coverage ratio |  | 1.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate percentage |  |  | 0.764% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Combined interest rate percentage |  |  | 2.514% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2013 |  |  | 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 |  |  | 7,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  |  | 67,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 97,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 5: 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 6: 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 + Details
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