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Shareholders' Equity (Initial Public Offering, Preferred Stock and Common Stock, Narrative) (Details) (USD $) | 12 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Jun. 30, 2012 Option Exchange Program | Dec. 31, 2012 Option Exchange Program | Aug. 10, 2009 Common Stock | Dec. 31, 2013 Common Stock | Dec. 31, 2012 Common Stock | Dec. 31, 2011 Common Stock | Jun. 30, 2012 Stock Options Option Exchange Program | Dec. 31, 2013 Restricted Stock | Dec. 31, 2012 Restricted Stock | Jun. 30, 2012 Restricted Stock Option Exchange Program | Jun. 30, 2012 Restricted Stock Option Exchange Program Minimum | Jun. 30, 2012 Restricted Stock Option Exchange Program Maximum
Initial Public Offering [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial public offering, effective date |  |  |  |  |  | Aug. 10, 2009 |  |  |  |  |  |  |  |  |
Initial public offering, shares issued |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |
Initial public offering, price per share |  |  |  |  |  | $ 17.00 |  |  |  |  |  |  |  |  |
Initial public offering, gross proceeds |  |  |  |  |  | $ 85,000,000 |  |  |  |  |  |  |  |  |
Initial public offering, underwriting discounts |  |  |  |  |  | 6,000,000 |  |  |  |  |  |  |  |  |
Initial public offering, issuance costs |  |  |  |  |  | 4,200,000 |  |  |  |  |  |  |  |  |
Initial public offering, net proceeds |  |  |  |  |  | 74,800,000 |  |  |  |  |  |  |  |  |
Initial public offering, number of shares common stock received in exchange for preferred stock |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |
Preferred Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized | 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, compensation for services, shares |  |  |  |  |  |  | 19,743 | 20,199 | 10,144 |  |  |  |  |  |
Stock issued during period, compensation for services, value |  |  |  |  |  |  | 56,000 | 78,000 | 59,000 |  |  |  |  |  |
Option Exchange Program, expiration date |  |  |  | May 21, 2012 |  |  |  |  |  |  |  |  |  |  |
Stock options forfeited |  |  |  |  |  |  |  |  |  | 424,475 |  |  |  |  |
Restricted stock granted |  |  |  |  |  |  |  |  |  |  | 195,925 | 286,453 | 147,828 |  |
Award vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year | 4 years
Share-based compensation | 674,955 | 636,528 | 779,305 |  | 0 |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to share-based payments | $ 1,500,000 |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |  |

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