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Derivative Instruments and Hedging Activities (Details 2) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2010	Oct. 18, 2010	Dec. 31, 2012	Dec. 31, 2011
Interest Rate Swap [Member]
Monthly net settlements cash settled	$ 7	$ (4,131)	$ (216)	$ (78)
Mark to market adjustments non-cash	139	5,002	0	337
Total effect of derivative instruments on the condensed consolidated statements of operations	$ 146	$ 871	$ (216)	$ 259

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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