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Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 09, 2011 | Mar. 31, 2014 | Dec. 31, 2013 | Aug. 08, 2013
Long-term debt |  |  |  |
Less current installments |  | $ (1,420) | $ (2,267) |
Long-term debt less current installments |  | 10,000 | 10,000 |
Revolving credit agreement |  |  |  |
Long-term debt |  |  |  |
Maximum borrowing capacity | 15,000 |  |  | 25,000
Variable rate basis | LIBOR | LIBOR | LIBOR |
Margin on variable rate (as a percent) | 1.25% | 1.50% | 1.50% |
Annual commitment fee (as a percent) | 0.25% | 0.25% |  |
Long-term debt less current installments |  | 10,000 | 10,000 |
Term loan |  |  |  |
Long-term debt |  |  |  |
Variable rate basis | LIBOR | LIBOR | LIBOR |
Margin on variable rate (as a percent) | 1.25% | 1.50% | 1.50% |
Face amount | 10,000 | 10,000 | 10,000 |
Monthly installments, including interest |  | 284 | 284 |
Total long-term debt |  | 1,420 | 2,267 |
Less current installments |  | $ (1,420) | $ (2,267) |

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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 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 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 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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 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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