Equity-Based Compensation Plans And Employee Benefit Plans (Summary Of Service-Based And Performance-Based Awards) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Service-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at December 31, 2011, Number of Phantom Units	126,212
Unvested at December 31, 2011, Average Grant Date Fair Value	$ 25.66
Unvested at December 31, 2011, Total Value	$ 3,239
Granted, Number of Phantom Units	37,248
Granted, Average Grant Date Fair Value	$ 46.61
Granted, Total Value	1,736
Forfeited, Number of Phantom Units	(6,169)
Forfeited, Average Grant Date Fair Value	$ 31.69
Forfeited, Total Value	(195)
Settled, Number of Phantom Units	(51,906)
Settled, Average Grant Date Fair Value	$ 20.18
Settled, Total Value	(1,047)
Unvested at December 31, 2012, Number of Phantom Units	105,385
Unvested at December 31, 2012, Average Grant Date Fair Value	$ 35.42
Unvested at December 31, 2012, Total Value	3,733
Performance-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested at December 31, 2011, Number of Phantom Units	228,501
Unvested at December 31, 2011, Average Grant Date Fair Value	$ 29.97
Unvested at December 31, 2011, Total Value	6,847
Granted, Number of Phantom Units	115,716
Granted, Average Grant Date Fair Value	$ 46.97
Granted, Total Value	5,435
Forfeited, Number of Phantom Units	(9,248)
Forfeited, Average Grant Date Fair Value	$ 31.69
Forfeited, Total Value	(293)
Settled, Number of Phantom Units	0
Unvested at December 31, 2012, Number of Phantom Units	334,969
Unvested at December 31, 2012, Average Grant Date Fair Value	$ 35.79
Unvested at December 31, 2012, Total Value	$ 11,989