Basis of Presentation and Significant Accounting Policies FX gain (loss) (Details) (USD $) In Thousands, unless otherwise specified	8 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Apr. 30, 2013	Dec. 31, 2012
Successor [Member]
Foreign Currency Transaction Gain, before Tax	$ (12,372)	$ 1,326
Predecessor [Member]
Foreign Currency Transaction Gain, before Tax			$ 8,694	$ (7,894)