XML 43 R50.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stock-Based Compensation and Awards (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
Stock-Based Compensation and Awards |
Summary of stock-based compensation expense included in results of operations | The following table presents the stock-based compensation expense included in our results of operations (in thousands):
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |  | 2012 |
Stock options |  | $ | 1,714 |  | $ | 2,241 |  | $ | 2,552 |
Restricted stock, restricted stock units, performance units, cash settled restricted stock units, cash settled performance units and phantom units |  | 25,087 |  | 20,518 |  | 16,583 |
Employee stock purchase plan |  | 175 |  | 142 |  | 114 |
Total stock-based compensation expense |  | $ | 26,976 |  | $ | 22,901 |  | $ | 19,249 |
Schedule of weighted average assumptions |
|  | Years Ended December 31, |
|  | 2014 |  | 2013 |  | 2012 |
Expected life in years |  | 4.5 |  | 4.5 |  | 4.5 |
Risk-free interest rate |  | 1.33 | % | 0.66 | % | 0.78 | %
Volatility |  | 46.51 | % | 49.19 | % | 47.96 | %
Dividend yield |  | 1.5 | % | 0.0 | % | 0.0 | %
Summary of stock option activity | The following table presents stock option activity during the year ended December 31, 2014:
|  | 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, 2014 |  | 2,152 |  | $ | 28.27 |  |  |  |  |
Granted |  | 107 |  | 41.18 |  |  |  |  |
Exercised |  | (730 | ) | 17.57 |  |  |  |  |
Cancelled |  | (34 | ) | 73.54 |  |  |  |  |
Options outstanding, December 31, 2014 |  | 1,495 |  | 33.39 |  | 2.6 |  | $ | 12,993 |
Options exercisable, December 31, 2014 |  | 1,251 |  | 33.95 |  | 2.1 |  | 11,567 |
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, restricted stock unit, performance unit, cash settled restricted stock unit and cash settled performance unit activity during the year ended December 31, 2014:
|  | Shares (in thousands) |  | Weighted Average Grant-Date Fair Value Per Share |
Non-vested awards, January 1, 2014 |  | 1,672 |  | $ | 18.97 |
Granted |  | 459 |  | 41.35 |
Vested |  | (897 | ) | 18.98 |
Cancelled |  | (64 | ) | 25.86 |
Non-vested awards, December 31, 2014(1) |  | 1,170 |  | 27.37 |
| (1) |  | Non-vested awards as of December 31, 2014 are comprised of 208,000 cash settled restricted stock units and cash settled performance units and 962,000 restricted shares, restricted stock units and performance units.
Schedule of phantom unit activity | The following table presents phantom unit activity during the year ended December 31, 2014:
|  | Phantom Units (in thousands) |  | Weighted Average Grant-Date Fair Value per Unit |
Phantom units outstanding, January 1, 2014 |  | 85 |  | $ | 23.72 |
Granted |  | 55 |  | 30.50 |
Vested |  | (48 | ) | 24.47 |
Phantom units outstanding, December 31, 2014 |  | 92 |  | 27.38 |

X
- Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration