Fair Value Measurements (Details Textual) (USD $)	3 Months Ended
	Jun. 30, 2014
Fair Value Measurements [Abstract]
Derivatives, unit per hour	$ 1
Level 3 Instruments [Member]
Fair Value Measurements [Abstract]
Unrealized losses related to financial instruments	1,000,000
Electricity swaps [Member]
Fair Value Measurements [Abstract]
Average forward price (per megawatt hour)	59
Premium over forward prices in nearby observable market (per megawatt hour)	8
Actual swap settlement price (per megawatt hour)	51
Decrease in valuation per $1 per megawatt hour decline in electricity price	$ 1,000,000