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Equity Incentive Awards Equity Incentive Awards (Notes) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Equity Incentive Awards | Equity Incentive Awards We follow Codification Topic "Stock Compensation" ("FASB ASC 718") in accounting for our share-based payments. This guidance requires measurement of the cost of employee services received in exchange for stock compensation based on the grant-date fair value of the employee stock awards. This cost is recognized as compensation expense ratably over the employee's requisite service period. Incremental compensation costs arising from subsequent modifications of awards after the grant date must be recognized when incurred. We use the Black-Scholes-Merton formula to estimate the value of stock options granted to employees, consultants and directors. Our 2014 Equity Incentive Plan (the "2014 Plan") was adopted by our Board of Directors on March 11, 2014 and approved by our stockholders on May 13, 2014. Pursuant to the 2014 Plan, our officers, directors, employees and consultants may be awarded (i) shares of common stock ("Restricted Stock Grants"), (ii) options to acquire shares of common stock ("Options"), including non-qualified stock options and incentive stock options within the meaning of Section 422 of the Internal Revenue Code, and (iii) other forms of equity awards subject to conditions and restrictions determined by the Compensation, Nominating, and Corporate Governance Committee of our Board of Directors (the "Compensation Committee"). The Compensation Committee will determine the vesting schedule, if any, of each Restricted Stock Grant or Option and the term of each Option, which term shall not exceed ten years from the date of grant. Shares that do not vest are forfeited. Dividends paid on restricted stock are not returnable, even if the underlying stock does not entirely vest. A maximum of 3,750,000 shares of common stock are available for grant under the 2014 Plan. As of December 31, 2015, 3,405,321 shares remained available for grant. Grants under the 2014 Plan are made by the Compensation Committee, which determines the individuals eligible to receive awards, the types of awards, and the terms, conditions and restrictions applicable to any award, except grants to directors which are made by the Board of Directors. Grants Issued On February 1, 2016, we awarded Restricted Stock Grants for 73,000 shares of common stock at a fair market value of approximately $4.9 million to certain members of our senior management for their service in 2016. These Restricted Stock Grants will vest on December 31, 2016. On February 1, 2016, we awarded Restricted Stock Grants for 45,784 shares of common stock at a fair market value of approximately $3.1 million to certain members of the Board of Directors for services as Chairman of the Board, Chairman of the Compensation Committee and Lead Director, Chairman of the Executive Committee and Chairman of the Audit Committee in 2016. One-third of the shares of restricted common stock covered by these awards will vest on each of December 31, 2016, December 31, 2017, and December 31, 2018. On November 3, 2015, we awarded a Restricted Stock Grants for 473 shares of common stock at a fair market value of approxim ately $28,300 to a cert ain member of our Board of Directors for services as Director rendered for the remainder of 2015. One-third of the shares of restricted common stock covered by these awards will vest on each of May 3, 2016, November 3, 2016, and November 3, 2017. On June 1, 2015, we awarded Restricted Stock Grants for 3,000 shares of common stock at a fair market value of approximately $0.2 million to a certain member of our senior management. This Restricted Stock Grant vested on December 31, 2015. On May 12, 2015, we awarded Restricted Stock Grants for 29,440 shares of common stock at a fair market value of approximately $1.6 million to certain members of our Board of Directors for their services rendered in 2015. One-third of the shares of restricted common stock covered by these awards will vest on each of November 12, 2015, May 12, 2016, and May 12, 2017. On February 2, 2015, we awarded Restricted Stock Grants for 78,000 shares of common stock at a fair market value of approximately $4.3 million to certain members of our senior management for their service in 2015. These Restricted Stock Grants vested on December 31, 2015. On February 2, 2015, we awarded Restricted Stock Grants for 47,101 shares of common stock at a fair market value of approximately $2.6 million to certain members of the Board of Directors for services as Chairman of the Board, Chairman of the Compensation Committee and Lead Director, Chairman of the Executive Committee and Chairman of the Audit Committee in 2015. One-third of the shares of restricted common stock covered by these awards will vest on each of December 31, 2015, December 31, 2016, and December 31, 2017. On May 13, 2014, we awarded Restricted Stock Grants for 84,666 shares of common stock at a fair market value of $3.6 million to certain members of our senior management for services rendered during the remainder of 2014. These Restricted Stock Grants vested on December 31, 2014. On May 13, 2014, we awarded Restricted Stock Grants for 62,000 shares of common stock at a fair market value of approximately $2.6 million to certain members of our Board of Directors for their services as Chairman of the Board, Chairman of the Compensation Committee and Lead Director, Chairman of the Executive Committee and Chairman of the Audit Committee for the remainder of 2014. One-third of the shares of restricted common stock covered by these awards vests on each of December 31, 2014, December 31, 2015, and December 31, 2016. On May 13, 2014, we awarded Restricted Stock Grants for 40,000 shares of common stock at fair market value of approximately $1.7 million to the Board of Directors for services as Director rendered for remainder of 2014. One-third of the shares of restricted common stock covered by these awards vests on each of November 13, 2014, May 13, 2015, and May 13, 2016. On May 8, 2013, we awarded Restricted Stock Grants for 40,000 shares of common stock at a fair market value of approximately $1.7 million to the members of the Board of Directors for services rendered during 2013. One-third of the shares of restricted common stock covered by these awards vested on each of November 8, 2013, May 8, 2014, and May 8, 2015. On April 10, 2013, we awarded Restricted Stock Grants for 2,000 shares of common stock at a fair market value of $80,200 to a member of our senior management. These Restricted Stock Grants vested on December 31, 2013. On March 13, 2013, we awarded Restricted Stock Grants for 666 shares of common stock at a fair market value of approximately $24,800 to a member of the Board of Directors. One-third of the shares of restricted common stock covered by these awards vested on each of September 13, 2013, March 13, 2014, and March 13, 2015. On February 1, 2013, we awarded Restricted Stock Grants for 68,666 shares of common stock at a fair market value of $2.5 million to certain members of our senior management for their services in 2013. These Restricted Stock Grants vested on December 31, 2013. On January 31, 2013, we awarded Restricted Stock Grants for 62,000 shares of common stock at a fair market value of approximately $2.2 million to certain members of the Board of Directors for their services as Chairman of the Board, Chairman of the Compensation Committee and Lead Director, Chairman of the Executive Committee and Chairman of the Audit Committee in 2013. One-third of the shares of restricted common stock covered by these awards vested on each of December 31, 2013, December 31, 2014, and December 31, 2015. The fair market value of our restricted stock grants is recorded as compensation expense and paid in capital over the vesting period. Stock-based compensation expense, reported in "General and administrative" on the Consolidated Statements of Income and Comprehensive Income, for the years ended December 31, 2015, 2014 and 2013 was approximately $8.6 million, $7.6 million, and $6.0 million, respectively. A summary of our restricted stock activity, and related information for the years ended December 31, 2015, 2014, and 2013 follows:
| Number of Shares | Weighted Average Grant Date Fair Value
Balance at December 31, 2012 | 94,020 |  | $ | 32.97 |
Shares granted | 173,332 |  | 37.32 |
Shares vested | (167,564 | ) | 34.97 |
Balance at December 31, 2013 | 99,788 |  | 37.17 |
Shares granted | 186,666 |  | 42.61 |
Shares vested | (184,229 | ) | 40.49 |
Balance at December 31, 2014 | 102,225 |  | 41.09 |
Shares granted | 158,014 |  | 54.68 |
Shares vested | (174,739 | ) | 49.17 |
Balance at December 31, 2015 | 85,500 |  | 49.72 |
Compensation expense to be recognized subsequent to December 31, 2015 for Restricted Stock Grants issued prior to 2015 that have not yet vested was approximately $3.8 million, which is expected to be recognized over a weighted average term of 1.4 years. Stock Options The fair value of each grant is estimated on the grant date using the Black-Scholes-Merton model. No options were issued, forfeited or expired during the years ended December 31, 2015, 2014, and 2013. A summary of our stock option activity, and related information for the years ended December 31, 2015, 2014, and 2013 follows:
|  | Shares Subject To Options |  | Weighted Average Exercise Price Per Share |  | Weighted Average Outstanding Contractual Life (in years)
Balance at December 31, 2012 |  | 1,105,600 |  |  | $ | 21.78 |  |  | 4.0
Options exercised |  | (20,000 | ) |  | 12.34 |  |  |
Balance at December 31, 2013 |  | 1,085,600 |  |  | 21.95 |  |  | 3.1
Options exercised |  | — |  |  | — |  |  |
Balance at December 31, 2014 |  | 1,085,600 |  |  | 21.95 |  |  | 2.1
Options exercised |  | (220,000 | ) |  | 17.35 |  |  |
Balance at December 31, 2015 |  | 865,600 |  |  | 23.12 |  |  | 1.6
Exercisable at December 31, 2015 |  | 865,600 |  |  | 23.12 |  |  | 1.6
The intrinsic value of outstanding and exercisable stock options represents the excess of the closing stock price as of the end of the year, over the exercise price multiplied by the applicable number of shares that may be acquired upon exercise of stock options. No options were exercised for the year ending December 31, 2014, and the intrinsic value of exercised options for the year ending December 31, 2015 and 2013, was $8.6 million and $0.5 million, respectively. For the years ending December 31, 2015, 2014 and 2013, the intrinsic value of outstanding and exercisable options was $37.7 million, $32.1 million and $15.5 million, respectively.

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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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