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Credit Facilities and Long-Term Debt (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Debt Instrument [Line Items] |  |  |
Revolving credit facilities | $ 75,553,000 |  | $ 40,453,000
Other | 163,000 |  | 195,000
Total debt | 75,716,000 |  | 40,648,000
Current maturities of debt | 75,675,000 |  | 40,573,000
Long-term debt | 41,000 |  | 75,000
Deferred Financing Costs [Abstract] |  |  |
Deferred financing costs | 2,300,000 |  | 2,600,000
Amortization of financing costs in 2013 | 900,000 |  |
Amortization of financing costs in 2014 | 1,200,000 |  |
Amortization of financing costs in 2015 | 200,000 |  |
Line of Credit Facility [Line Items] |  |  |
Maximum borrowing capacity | 200,000,000 |  |
Expiration date | Mar. 01, 2015 |  |
Additional available borrowing capacity | 115,800,000 |  |
Outstanding borrowings under credit facility | 75,553,000 |  | 40,453,000
Financial covenants | At any time that our average borrowing availability over the previous thirty days is less than $30 million or if our borrowing availability is $20 million or less, and until such time that we have maintained an average borrowing availability of $30 million or greater for a continuous period of ninety days, the terms of our restated credit agreement provide for, among other provisions, financial covenants requiring us, on a consolidated basis, (1) to maintain specified levels of fixed charge coverage at the end of each fiscal quarter (rolling twelve months), and (2) to limit capital expenditure levels. |  |
Capital lease obligations | 163,000 |  | 195,000
Direct Borrowings [Member] | Minimum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Margin on variable rate (in hundredths) | 1.75% |  |
Direct Borrowings [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Margin on variable rate (in hundredths) | 2.25% |  |
Index Loan [Member] | Minimum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Margin on variable rate (in hundredths) | 0.75% |  |
Index Loan [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Margin on variable rate (in hundredths) | 1.25% |  |
General Electric Capital Corporation Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Revolving credit facilities | 75,500,000 |  | 40,400,000
Line of Credit Facility [Line Items] |  |  |
Outstanding borrowings under credit facility | 75,500,000 |  | 40,400,000
Weighted average interest rate (in hundredths) | 2.10% |  | 2.70%
General Electric Capital Corporation Credit Facility [Member] | Minimum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Conditions for required financial covenants, minimum average borrowing availability over previous 30 days | 30,000,000 |  |
Conditions for required financial covenants, minimum average borrowing availability over continuous 90 Days | 30,000,000 |  |
General Electric Capital Corporation Credit Facility [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Conditions for required financial covenants, maximum borrowing availability | 20,000,000 |  |
General Electric Capital Corporation Credit Facility [Member] | Direct Borrowings [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Revolving credit facilities | 69,000,000 |  | 25,000,000
Line of Credit Facility [Line Items] |  |  |
Outstanding borrowings under credit facility | 69,000,000 |  | 25,000,000
Weighted average interest rate (in hundredths) | 2.00% |  | 2.00%
General Electric Capital Corporation Credit Facility [Member] | Index Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Revolving credit facilities | 6,500,000 |  | 15,400,000
Line of Credit Facility [Line Items] |  |  |
Outstanding borrowings under credit facility | 6,500,000 |  | 15,400,000
Weighted average interest rate (in hundredths) | 4.00% |  | 4.00%
Average daily loan balance outstanding | 5,700,000 | 5,000,000 | 6,100,000
GE Canada Finance Holding Company Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Revolving credit facilities | 0 |  |
Line of Credit Facility [Line Items] |  |  |
Maximum borrowing capacity | 10,000,000 |  |
Outstanding borrowings under credit facility | 0 |  |
Line of Credit [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Maximum borrowing capacity | $ 10,000,000 |  |

X
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- Definition Represents the amount of average borrowing availability over the continuous period of 90 days, over which the Company is subject to financial covenants under the revolving credit facility. + References No definition available. + Details
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- Definition Represents the amount of average borrowing availability over previous 30 days, below which the Company is subject to financial covenants under the revolving credit facility. + References No definition available. + Details
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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date. + 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45023-112735 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 7, 10, 13 -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 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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