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Stock-Based Compensation | 9 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation | 14. Stock-Based Compensation Stock Incentive Plan In April 2013, we adopted the 2013 Plan to provide for the granting of stock options, restricted stock, restricted stock units, stock appreciation rights, performance units, other stock-based awards and dividend equivalent rights to employees, directors and consultants of Archrock. Under the 2013 Plan, the maximum number of shares of common stock available for issuance pursuant to awards is 10,100,000. Each option and stock appreciation right granted counts as one share against the aggregate share limit, and any share subject to a stock settled award other than a stock option, stock appreciation right or other award for which the recipient pays intrinsic value counts as 1.75 shares against the aggregate share limit. Shares subject to awards granted under the 2013 Plan that are subsequently canceled, terminated, settled in cash or forfeited (excluding shares withheld to satisfy tax withholding obligations or to pay the exercise price of an option) are, to the extent of such cancellation, termination, settlement or forfeiture, available for future grant under the 2013 Plan. Cash-settled awards are not counted against the aggregate share limit. No additional grants may be made under the 2007 Plan. Previous grants made under the 2007 Plan will continue to be governed by that plan and the applicable award agreements. Stock Options Stock options are granted at fair market value at the grant date, are exercisable according to the vesting schedule established by the compensation committee of our board of directors in its sole discretion and expire no later than seven years after the grant date. Stock options generally vest one-third per year on each of the first three anniversaries of the grant date, subject to continued service through the applicable vesting date. The following table presents stock option activity during the nine months ended September 30, 2017:
| Stock Options (in thousands) |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Life (in years) |  | Aggregate Intrinsic Value (in thousands)
Options outstanding, January 1, 2017 | 747 |  |  | $ | 16.88 |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | (83 | ) |  | 12.04 |  |  |  |  |  |
Canceled | (175 | ) |  | 32.00 |  |  |  |  |
Options outstanding, September 30, 2017 | 489 |  |  | 12.28 |  |  | 1.8 |  | $ | 1,494 |
Options exercisable, September 30, 2017 | 489 |  |  | 12.28 |  |  | 1.8 |  | 1,494 |
Intrinsic value is the difference between the market value of our stock and the exercise price of each stock option multiplied by the number of stock options outstanding for those stock options where the market value exceeds their exercise price. The total intrinsic value of stock options exercised during the nine months ended September 30, 2017 was $0.3 million. Restricted Stock, Stock-Settled Restricted Stock Units, Performance Units, Cash-Settled Restricted Stock Units and Cash Settled Performance Units For grants of restricted stock, restricted stock units and performance units, we recognize compensation expense over the vesting period equal to the fair value of our common stock at the grant date. Our restricted stock, restricted stock units, and performance units include rights to receive dividends or dividend equivalents. We remeasure the fair value of cash-settled restricted stock units and cash-settled performance units and record a cumulative adjustment of the expense previously recognized. Our obligation related to the cash-settled restricted stock units and cash settled performance units is reflected as a liability in our condensed consolidated balance sheets. Restricted stock, stock-settled restricted stock units, cash-settled restricted stock units and cash-settled performance units generally vest one-third per year on dates as specified in the applicable award agreement, subject to continued service through the applicable vesting date. Stock-settled performance units cliff vest at the end of the performance period as specified in the terms of the applicable award agreement, subject to continued service through the applicable vesting date. The following table presents restricted stock, restricted stock unit, performance unit, cash-settled restricted stock unit and cash- settled performance unit activity during the nine months ended September 30, 2017:
| Shares (in thousands) |  | Weighted Average Grant Date Fair Value Per Share
Non-vested awards, January 1, 2017 | 1,612 |  |  | $ | 10.08 |
Granted | 811 |  |  | 12.95 |
Vested | (668 | ) |  | 12.30 |
Canceled | (105 | ) |  | 10.82 |
Non-vested awards, September 30, 2017 (1) | 1,650 |  |  | 10.54 |
(1) | Non-vested awards as of September 30, 2017 are comprised of 258,000 cash-settled restricted stock units and cash-settled performance units and 1,392,000 restricted shares and stock-settled performance units.
As of September 30, 2017, we expect $12.8 million of unrecognized compensation cost related to unvested restricted stock, stock-settled restricted stock units, performance units, cash-settled restricted stock units and cash-settled performance units to be recognized over the weighted-average period of 2.2 years. Partnership Long-Term Incentive Plan In April 2017, the Partnership adopted the 2017 Partnership LTIP to provide for the benefit of employees, directors and consultants of the Partnership, us and our respective affiliates. Two million common units have been authorized for issuance with respect to awards under the 2017 Partnership LTIP. The 2017 Partnership LTIP provides for the issuance of unit options, unit appreciation rights, restricted units, phantom units, performance awards, bonus awards, distribution equivalent rights, cash awards and other unit based awards. The Partnership Plan will be administered by the Partnership Plan Administrator. The 2006 Partnership LTIP expired in 2016 and as such no further grants can be made under that plan. Previous grants made under the 2006 Partnership LTIP will continue to be governed by the 2006 Partnership LTIP and the applicable award agreements. Phantom units are notional units that entitle the grantee to receive common units upon the vesting of such phantom units or, at the discretion of the Partnership Plan Administrator, cash equal to the fair market value of such common units. Phantom units may include nonforfeitable tandem distribution equivalent rights to receive cash distributions on unvested phantom units in the quarter in which distributions are paid on common units. For grants of phantom units, we recognize compensation expense over the vesting period equal to the fair value of the Partnership’s common units at the grant date. Phantom units generally vest one-third per year on dates as specified in the applicable award agreements subject to continued service through the applicable vesting date. Partnership Phantom Units The following table presents phantom unit activity during the nine months ended September 30, 2017:
| Phantom Units (in thousands) |  | Weighted Average Grant Date Fair Value per Unit
Phantom units outstanding, January 1, 2017 | 197 |  |  | $ | 11.60 |
Granted | 81 |  |  | 16.28 |
Vested | (89 | ) |  | 14.86 |
Canceled | (11 | ) |  | 7.84 |
Phantom units outstanding, September 30, 2017 | 178 |  |  | 12.32 |
As of September 30, 2017, we expect $1.7 million of unrecognized compensation cost related to unvested phantom units to be recognized over the weighted-average period of 2.1 years.

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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 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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