Net Income (Loss) Per Unit (Tables)

9 Months Ended

Sep. 30, 2011

Net Income (Loss) Per Unit [Abstract]

Potentially dilutive common equity excluded from the dilutive net income (loss)

	Three Months				Nine Months
	Ended				Ended
	September 30,				September 30,
	2011		2010		2011		2010
			(In thousands)
Employee options		800		1,096		800		1,096
Unit appreciation rights		401		359		401		359
Restricted units		43		54		43		54
Phantom units		993		884		993		884
Contingent incentive plan unit awards		73		33		73		61
Series A preferred units		11,399		8,082		11,399		2,724