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Credit Arrangements (Details 2) | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended
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Dec. 28, 2012 Senior Notes USD ($) | Dec. 31, 2012 Senior Notes USD ($) | Dec. 31, 2012 Senior Notes Minimum USD ($) | Dec. 31, 2012 Notes Agreement | Dec. 31, 2012 Notes Agreement Minimum | Dec. 28, 2012 Notes Agreement Maximum USD ($) | Dec. 31, 2012 Notes Agreement Maximum | Nov. 12, 2010 Subordinated Promissory Note Rockford USD ($) | Dec. 18, 2009 Subordinated Promissory Note JCG USD ($) | Dec. 31, 2012 Note A Rockford USD ($) | Nov. 12, 2010 Note A Rockford USD ($) | Nov. 12, 2010 Note B Rockford USD ($) | Dec. 31, 2012 Credit Agreement LIBOR | Dec. 31, 2012 Credit Agreement Base rate | Dec. 31, 2012 Credit Agreement Federal funds rate | Dec. 31, 2012 Credit Agreement Prime rate | Dec. 31, 2012 Credit Agreement Minimum | Dec. 31, 2012 Credit Agreement Revolving line of credit USD ($) | Dec. 28, 2012 Credit Agreement Revolving line of credit USD ($) | Dec. 31, 2012 Credit Agreement Revolving line of credit Minimum USD ($) | Dec. 31, 2012 Canadian Credit Facility Commercial letters of credit CAD | Dec. 31, 2011 Canadian Credit Facility Commercial letters of credit CAD | Dec. 31, 2012 Canadian Credit Facility Commercial letters of credit Maximum
Credit arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,000,000 |  | 10,000,000 |  |
Incremental maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |
Variable rate basis |  |  |  |  |  |  |  |  |  |  |  |  | LIBOR | Base Rate | Federal Funds Rate | prime rate |  |  |  |  |  |  |
Basis spread on variable rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |
Prepayment to be paid on debt |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |
Additional borrowings | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  | 3.65% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional borrowings to be incurred during the first three years of the debt agreement |  |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years in which additional notes can be issued |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity term of debt instrument |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restrictions on investments, change of control provisions and provisions as a percentage of total assets to be disposed off |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |
Total commercial letters of credit outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,808,000 |  |  | 1,364,000 | 4,036,000 |
Available borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70,192,000 |  |  | 8,636,000 |  |
Term of credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years
Annual fee (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |
Required principal payment |  | 7,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial principal amount |  |  |  |  |  |  |  | 16,712,000 | 53,500,000 |  | 9,669,000 | 7,043,000 |  |  |  |  |  |  |  |  |  |  |
Amount outstanding |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Payment that the entity was required to make to cancel the notes |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Represents the number of years at the beginning of the debt agreement that additional notes can be issued. + References No definition available. + Details
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- Definition Represents the restrictions on investments, change of control provisions and provisions, expressed as a percentage of total assets to be disposed off as per the financial covenant. + References No definition available. + Details
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- Definition Represents the maturity term of the debt instrument. + References No definition available. + Details
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- Definition The annual fee percentage based on any issued and outstanding letters of credit under the facility. + References No definition available. + Details
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- Definition Represents the incremental maximum borrowing capacity under the credit facility. + References No definition available. + Details
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- Definition The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -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. + Details
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- Definition Amount of the required periodic payments applied to principal. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + 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 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 Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section F Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 Reference 3: 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 4: 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 5: 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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