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Stock-Based Compensation | 3 Months Ended
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Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
STOCK-BASED COMPENSATION | STOCK-BASED COMPENSATION The Company has stock incentive plans for executives and eligible employees. Stock awards include stock options, restricted stock, and performance shares. Stock-based compensation expense for the three months ended March 31, 2016 and 2015 was $2.9 million and $2.2 million, respectively. At March 31, 2016, there was $11.3 million of unrecognized stock-based compensation cost which is expected to be recognized over a weighted-average remaining vesting period of 1.7 years. During the three months ended March 31, 2016, the supplemental incentive accrual increased $0.2 million to $1.4 million. The following table summarizes the grants awarded during the three months ended March 31, 2016:
Grant date |  | Restricted stock |  | Grant date fair value of restricted stock |  | Stock options |  | Grant date fair value of stock options |  | Performance shares |  | Grant date fair value of performance shares
January 20, 2016 |  | 1,030,833 |  |  | $ | 1.81 |  |  | 165,479 |  |  | $ | 0.86 |  |  | 1,428,314 |  |  | $ | 2.92 |
March 21, 2016 |  | 685,633 |  |  | $ | 5.76 |  |  | 17,772 |  |  | $ | 2.84 |  |  | 8,763 |  |  | $ | 4.90 |
The following options and stock appreciation rights were exercisable during the three months ended March 31, 2016:
Award Type |  | Number of Exercised Units |  | Weighted Average Exercised Price |  | Number of Exercisable Units |  | Weighted Average Exercisable Price
Stock options |  | — |  |  | $ | — |  |  | 348,279 |  |  | $ | 17.68 |
Stock appreciation rights |  | — |  |  | $ | — |  |  | 46,572 |  |  | $ | 14.06 |

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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=51659978&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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