Equity-Based Compensation (tables)

12 Months Ended

Dec. 31, 2014

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

The following table summarizes WGP LTIP award activity for WGP GP independent directors and executive officers for the years ended December 31, 2014 and 2013:



	2014				2013
	Weighted-Average Grant-Date Fair Value		Units		Weighted-Average Grant-Date Fair Value		Units
Phantom units outstanding at beginning of year	$	39.19	36,238		$	—	—
Vested	37.32		(18,400	)	—		—
Granted	51.19		4,398		39.19		36,238
Phantom units outstanding at end of year	43.10		22,236		39.19		36,238

Western Gas Partners [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

LTIP Award Activity Tables

The following table summarizes WES LTIP award activity for the years ended December 31, 2014, 2013 and 2012:



	2014				2013				2012
	Weighted-Average Grant-Date Fair Value		Units		Weighted-Average Grant-Date Fair Value		Units		Weighted-Average Grant-Date Fair Value		Units
Phantom units outstanding at beginning of year	$	49.47	16,844		$	41.77	25,619		$	33.92	23,978
Vested	49.55		(13,122	)	41.28		(14,695	)	33.20		(14,260	)
Granted	68.14		5,800		62.49		5,920		45.91		15,901
Phantom units outstanding at end of year	60.74		9,522		49.47		16,844		41.77		25,619

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

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