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Common Stock (Reconciliation of Common Shares Issued and Additional Disclosures) (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 $ / shares shares | Feb. 07, 2014 shares | Dec. 31, 2015 series $ / shares shares | Dec. 31, 2014 $ / shares shares | Dec. 31, 2013 shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |  |  |
Common stock, shares authorized | 80,000,000 |  | 80,000,000 | 80,000,000 |
Common stock, par value (in dollars per share) | $ / shares | $ 0.0001 |  | $ 0.0001 | $ 0.0001 |
Preferred stock. shares authorized | 100,000 |  | 100,000 | 100,000 |
Preferred stock, minimum number of series authorized | series |  |  | 1 |  |
Preferred stock, par value (in dollars per share) | $ / shares | $ 0.0001 |  | $ 0.0001 | $ 0.0001 |
Reconciliation of Changes in Common Shares Issued |  |  |  |  |
Shares issued at the beginning of the year |  |  | 54,633,726 | 58,265,911 |
Issued in acquisitions |  |  | 60,024 | 99,681 |
Issued in payment of accrued liability |  |  | 0 | 27,101 |
Issued upon exercise of warrants |  | 1,277,250 | 0 | 1,277,250 | 267,000
Issued as restricted stock award grants |  |  | 758,904 | 525,120 |
Issued upon exercise of stock options |  |  | 767,560 | 311,954 |
Retirement of treasury shares | (5,873,291) |  | 0 | (5,873,291) |
Shares issued at the end of the year | 54,633,726 |  | 56,220,214 | 54,633,726 | 58,265,911

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- Definition Face amount or stated value per share of common stock. + 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 210.5-02.29) -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 30 -Article 5 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + 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 210.5-02.29) -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 30 -Article 5 + Details
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