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Stock-Based Compensation and Awards (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of weighted average assumptions | The weighted average grant date fair value for stock options granted during the years ended December 31, 2014 and 2013 was $14.47 and $10.19, respectively, and was estimated using the Black-Scholes option valuation model with the following weighted average assumptions:
| Years Ended December 31,
| 2014 |  | 2013
Expected life in years | 4.5 |  |  | 4.5 |
Risk-free interest rate | 1.33 | % |  | 0.66 | %
Volatility | 46.51 | % |  | 49.19 | %
Dividend yield | 1.5 | % |  | 0.0 | %
Summary of stock option activity | The following table presents stock option activity during the year ended December 31, 2015:
| Stock Options (in thousands) |  | Weighted Average Exercise Price Per Share (2) |  | Weighted Average Remaining Life (in years) |  | Aggregate Intrinsic Value (in thousands)
Options outstanding, January 1, 2015 | 1,495 |  |  | $ | 33.39 |  |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |  |
Exercised | (90 | ) |  | 12.29 |  |  |  |  |  |
Canceled | (300 | ) |  | 59.91 |  |  |  |  |  |
Spin-off of Exterran Corporation (1) | 142 |  |  | (56.65 | ) |  |  |  |
Options outstanding, December 31, 2015 | 1,247 |  |  | 18.28 |  |  | 2.2 |  | $ | 278 |
Options exercisable, December 31, 2015 | 1,118 |  |  | 17.97 |  |  | 1.9 |  | 278 |
(1) | Reflects adjustment of awards outstanding and the exercise price as a result of the Spin-off.
(2) | Activity prior to the Spin-off reflects historical exercise price.
Schedule of restricted stock, restricted stock unit, performance unit, cash settled restricted stock unit and cash settled performance award activity | The following table presents restricted stock, stock-settled restricted stock unit, performance unit, cash-settled restricted stock unit and cash-settled performance unit activity during the year ended December 31, 2015:
| Shares (in thousands) |  | Weighted Average Grant-Date Fair Value Per Share (3)
Non-vested awards, January 1, 2015 | 1,170 |  |  | $ | 27.37 |
Granted | 1,008 |  |  | 25.49 |
Vested | (809 | ) |  | 23.05 |
Canceled | (53 | ) |  | 30.25 |
Spin-off of Exterran Corporation (1) | (161 | ) |  | (99.93 | )
Non-vested awards, December 31, 2015 (2) | 1,155 |  |  | 18.50 |
(1) | Reflects adjustment of outstanding awards in connection with and the grant date fair value adjusted as a result of, the Spin-off.
(2) | Non-vested awards as of December 31, 2015 are comprised of 55,000 cash settled restricted stock units and cash settled performance units and 1,100,000 restricted shares, stock-settled restricted stock units and performance units.
(3) | Excluding the Spin-off of Exterran Corporation adjustment, reflects historical grant date fair value.
Schedule of phantom unit activity | The following table presents phantom unit activity during the year ended December 31, 2015:
| Phantom Units (in thousands) |  | Weighted Average Grant-Date Fair Value per Unit
Phantom units outstanding, January 1, 2015 | 92 |  |  | $ | 27.38 |
Granted | 45 |  |  | 24.87 |
Vested | (60 | ) |  | 25.94 |
Phantom units outstanding, December 31, 2015 | 77 |  |  | 27.01 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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