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Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Employee Benefit Plans | Employee Benefit Plans Long-Term Incentive Plan As of September 30, 2018, there were 1.8 million shares of our common stock available for issuance under our long-term incentive plan, the 2005 Long-Term Incentive Plan, as amended and restated January 1, 2017 (the “2005 Incentive Plan”). During the nine-month period ended September 30, 2018, the following grants of share-based awards were made under the 2005 Incentive Plan:
Date of Grant |  |  | Shares / Units |  |  |  | Grant Date Fair Value Per Share |  |  | Vesting Period
January 2, 2018 (1) |  |  | 449,271 |  |  |  |  | $ | 7.54 |  |  |  | 33% per year over three years
January 2, 2018 (2) |  |  | 449,271 |  |  |  |  | 10.44 |  |  |  | 100% on January 2, 2021
January 2, 2018 (3) |  |  | 8,247 |  |  |  |  | 7.54 |  |  |  | 100% on January 1, 2020
April 2, 2018 (3) |  |  | 11,064 |  |  |  |  | 5.79 |  |  |  | 100% on January 1, 2020
July 2, 2018 (3) |  |  | 6,565 |  |  |  |  | 8.33 |  |  |  | 100% on January 1, 2020
August 21, 2018 (4) |  |  | 6,093 |  |  |  |  | 8.97 |  |  |  | 100% on August 21, 2019
(1) | Reflects grants of restricted stock to our executive officers.
(2) | Reflects grants of performance share units (“PSUs”) to our executive officers. The PSUs provide for an award based on the performance of our common stock over a three-year period with the maximum amount of the award being 200% of the original awarded PSUs and the minimum amount being zero. These awards when vested can only be settled in shares of our common stock.
(3) | Reflects grants of restricted stock to certain independent members of our Board of Directors (the “Board”) who have made an election to take their quarterly fees in stock in lieu of cash.
(4) | Reflects a grant of restricted stock made to a new independent member of our Board upon his joining our Board.
Compensation cost for restricted stock is the product of grant date fair value of each share and the number of shares granted and is recognized over the applicable vesting periods on a straight-line basis. Forfeitures are recognized as they occur. For the three- and nine-month periods ended September 30, 2018, $1.5 million and $4.5 million, respectively, were recognized as share-based compensation related to restricted stock. For the three- and nine-month periods ended September 30, 2017, $1.7 million and $5.4 million, respectively, were recognized as share-based compensation related to restricted stock. The estimated fair value of PSUs is determined using a Monte Carlo simulation model. The PSUs granted in 2017 and 2018 are accounted for as equity awards whereas awards granted prior to 2017 are accounted for as liability awards. Compensation cost for PSUs that are accounted for as equity awards is measured based on the estimated grant date fair value and recognized over the vesting period on a straight-line basis. PSUs that are accounted for as liability awards are measured based on the estimated fair value at the balance sheet date and changes in fair value of the awards are recognized in earnings. Cumulative compensation cost for vested liability PSU awards equals the actual payout value upon vesting. For the three- and nine-month periods ended September 30, 2018, $6.3 million and $11.5 million, respectively, were recognized as share-based compensation related to PSUs. For the three- and nine-month periods ended September 30, 2017, $4.0 million and $5.8 million, respectively, were recognized as share-based compensation related to PSUs. The liability balance for unvested PSUs that are accounted for as liability awards was $18.8 million at September 30, 2018 and $11.1 million at December 31, 2017. We paid $0.9 million in cash to settle the 2015 PSU awards when they vested in January 2018. Additionally in January 2018, we granted $5.0 million of fixed value cash awards to select management employees under the 2005 Incentive Plan. The value of these cash awards is recognized on a straight-line basis over a vesting period of three years. For the three- and nine-month periods ended September 30, 2018, $0.5 million and $1.3 million, respectively, was recognized as compensation cost. Employee Stock Purchase Plan We have an employee stock purchase plan (the “ESPP”). The ESPP has 1.5 million shares authorized for issuance, of which 0.5 million shares were available for issuance as of September 30, 2018. The ESPP currently has a purchase limit of 130 shares per employee per purchase period. For more information regarding our employee benefit plans, including our long-term incentive stock-based and cash plans and our employee stock purchase plan, see Note 11 to our 2017 Form 10-K.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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