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Short-term and Long-term Debt - Line of Credit (Details) (USD $) | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Line of Credit Facility [Line Items] |  |
Line of credit amount | $ 5,209,000 |
Revolving line of credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit amount | 30,000,000 |
Line of credit outstanding balance | 0 | 0
Tangible net worth | 326,218,000 |
Liquid Assets | 57,095,000 |
Revolving line of credit | Minimum |  |
Line of Credit Facility [Line Items] |  |
Minimum tangible net worth required | 225,000,000 |
Liquid assets | 25,000,000 |
Revolving line of credit | Selected LIBOR rate |  |
Line of Credit Facility [Line Items] |  |
Interest rate on line of credit, variable rate | 1.75% |
Revolving line of credit | LIBOR for a fixed rate term |  |
Line of Credit Facility [Line Items] |  |
Interest rate on line of credit, variable rate | 1.50% |
Line of Credit |  |
Line of Credit Facility [Line Items] |  |
Line of credit amount | $ 87,095,000 |

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- Definition The percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: 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 Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any 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 Reference 2: 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 The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 54 -Subparagraph 3a -IssueDate 2006-05-01 -Chapter 17 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(a) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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