Revenues (Tables)

6 Months Ended

Sep. 30, 2013

Revenues

Schedule of components of fee-based revenue

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Long-term contract revenue	$	20,287	$	28,129	$	40,883	$	55,791
Short-term contract revenue	12,910		12,869		23,784		22,268
Total	$	33,197	$	40,998	$	64,667	$	78,059

Schedule of components of optimization, net

	Three Months Ended						Six Months Ended
	September 30,						September 30,
	2013			2012			2013		2012
Realized optimization revenue, net	$	17,298		$	12,238		$	22,898	$	45,859
Unrealized risk management (losses) gains	(13,632		)	(28,691		)	6,486		(79,879		)
Write-down of inventory	—			—			—		(22,281		)
Total	$	3,666		$	(16,453	)	$	29,384	$	(56,301	)