Intangible Assets (Expected Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Dec. 31, 2013	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, weighted average remaining period		13 years 9 months 1 day
Amortization of intangible assets	$ 2,600	$ 8,019
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2014 (Remaining three months ending March 31, 2014)	2,235	2,235
2015	8,949	8,949
2016	8,949	8,949
2017	8,949	8,949
2018	8,949	8,949
Thereafter	85,080	85,080
Intangible assets, net	$ 123,111	$ 123,111
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful lives		3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful lives		30 years