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Stock-Based Compensation | 12 Months Ended
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Dec. 31, 2014
Stock-Based Compensation [Abstract] |
Stock Based Compensation | Stock-Based Compensation In July 2011, a Special Meeting of Stockholders of Heartland Express, Inc. was held, at which meeting the approval of the Heartland Express, Inc. 2011 Restricted Stock Award Plan (the “Plan”) was ratified. The Plan is administered by the Compensation Committee of our Board of Directors. Per the terms of the awards, employees receiving awards will have all of the rights of a stockholder with respect to the unvested restricted shares including, but not limited to, the right to receive such cash dividends, if any, as may be declared on such shares from time to time and the right to vote such shares at any meeting of our stockholders. The Plan made available up to 0.9 million shares for the purpose of making restricted stock grants to our eligible officers and employees. During December 2011, 0.4 million shares were granted to employees and no additional shares were granted during 2012. There were 0.05 million shares granted during 2014 and 0.02 million shares were granted in 2013. The shares granted under the Plan during 2011 are service based awards beginning December 14, 2011 and 20% of the awards vest each June 1st through 2016. The shares issued in 2014 and 2013 are also service based awards and generally vest evenly from the date of grant through the fifth anniversary date of the grant. Once vested, there are no other restrictions on the awards. Compensation expense associated with these awards is based on the market value of our stock on the grant date. Our market closing price on December 14, 2011, grant date, was $13.57 and ranged between $13.86 and $18.18 on the various grant dates for the shares issued in 2013. The Company's market close price ranged between $21.72 and $27.47 on the various grant dates during 2014. There were no significant assumptions made in determining the fair value. Compensation expense associated with restricted stock awards is included in salaries, wages and benefits in the consolidated statements of comprehensive income. Compensation expense associated with restricted stock awards was $1.1 million, $1.2 million, and $2.4 million for the years ended December 31, 2014, 2013, and 2012 respectively. Unrecognized compensation expense was $1.3 million at December 31, 2014 which will be recognized over a weighted average period of 1.5 years. The following table summarizes our restricted stock award activity for the years ended December 31, 2014, 2013 and 2012. The vesting date for the majority of awards vested in 2014 was June 1, 2014. The fair value of awards vested during 2014, 2013 and 2012 was $1.1 million, $1.1 million and $1.0 million, respectively.
| 2014
| Number of Shares of Restricted Stock Awards (in thousands) |  | Weighted Average Grant Date Fair Value
Unvested at beginning of year | 211.5 |  |  | $ | 13.81 |
Granted | 52.2 |  |  | 25.40 |
Vested | (75.6 | ) |  | 14.34 |
Forfeited | (5.0 | ) |  | 13.57 |
Outstanding (unvested) at end of year | 183.1 |  |  | $ | 16.78 |
| 2013
| Number of Shares of Restricted Stock Awards (in thousands) |  | Weighted Average Grant Date Fair Value
Unvested at beginning of year | 276.8 |  |  | $ | 13.57 |
Granted | 23.0 |  |  | 17.28 |
Vested | (75.3 | ) |  | 14.04 |
Forfeited | (13.0 | ) |  | 13.57 |
Outstanding (unvested) at end of year | 211.5 |  |  | $ | 13.81 |
| 2012
| Number of Shares of Restricted Stock Awards (in thousands) |  | Weighted Average Grant Date Fair Value
Unvested at beginning of year | 351.0 |  |  | $ | 13.57 |
Granted | — |  |  | — |
Vested | (70.2 | ) |  | 13.57 |
Forfeited | (4.0 | ) |  | 13.57 |
Outstanding (unvested) at end of year | 276.8 |  |  | $ | 13.57 |

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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 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: 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 3: 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 4: 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 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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