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Stockholders' Equity (Details Textual) (USD $) | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2014 | Dec. 31, 2007 | Dec. 31, 2013 | Mar. 27, 2014 Series B Junior Participating Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items] |  |  |  |
Treasury shares | 40,481 |  | 40,481 |
Treasury Stock Acquired, Average Cost Per Share | $ 106.62 |  |  |
Amount Available Under Stock Repurchase Plan | $ 3,184,000 | $ 7,500,000 |  |
Share Purchase Price |  |  |  | $ 13.50
Preferred Stock, Par or Stated Value Per Share | $ 0.01 |  | $ 0.01 | $ 0.01
Beneficial Ownership Percentage |  |  |  | 4.99%

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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + 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 210.5-02.28) -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 29 -Article 5 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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