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Stock-Based Compensation | 6 Months Ended
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Jun. 30, 2015
Share-based Compensation [Abstract] |
Stock-Based Compensation | Stock-Based Compensation The Company recognizes stock-based compensation in accordance with the provisions of ASC Topic 718, Compensation--Stock-Based Compensation. Stock-based compensation expense was $916 and $899 for the three months ended June 30, 2015 and 2014, respectively, and $1,874 and $1,902 for the six months ended June 30, 2015 and 2014, respectively. As of June 30, 2015, there was $2,159 of total unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted-average period of 2.44 years. As of June 30, 2015, there was $4,842 of total unrecognized compensation expense related to restricted stock awards, which is expected to be recognized over a weighted-average period of 2.78 years. The Company granted 0 and 163 restricted stock awards to employees under the terms of the Amended and Restated 2006 Stock Incentive Plan during the three and six months ended June 30, 2015, respectively. The Company granted 0 and 225 restricted stock awards to employees under the terms of the Amended and Restated 2006 Stock Incentive Plan during the three and six months ended June 30, 2014, respectively. The restricted stock awards vest ratably over four years from the date of grant subject to the recipient remaining employed through the applicable vesting dates. Compensation expense for restricted stock awards is measured at fair value on the date of grant based on the number of shares granted and the quoted market closing price of the Company’s common stock. Such value is recognized as expense over the vesting period of the award, net of estimated forfeitures. The Company granted 0 and 95 stock options during the three and six months ended June 30, 2015, respectively, and 57 stock options during the three and six months ended June 30, 2014 to employees under the terms of the Amended and Restated 2006 Stock Incentive Plan. The fair value of stock options granted during the six months ended June 30, 2015 and 2014 was estimated as of the date of grant using the Black-Scholes option-pricing model. The weighted-average fair value per share for all options granted during the six months ended June 30, 2015 and 2014 was $12.76 and $5.23, respectively. The weighted-average assumptions used to value options as of their grant date were as follows:
| Six Months Ended |  | Six Months Ended
| June 30, 2015 |  | June 30, 2014
Risk-free interest rate | 1.54 | % |  | 1.35 | %
Expected volatility | 44.30 | % |  | 47.65 | %
Expected life (in years) | 4.18 |  |  | 4.20 |
Dividend yield | 0 | % |  | 0 | %

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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