Commitments and Contingencies (Litigation) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended	18 Months Ended	57 Months Ended
	Dec. 31, 2014	Mar. 31, 2014	Dec. 15, 2009 plaintiffs claims	Dec. 31, 2014 claims	Jul. 02, 2010 claims
Legal proceedings and investigations arising in the ordinary course of business | Maximum
Loss Contingencies [Line Items]
Loss contingencies, damages sought, value	$ 40.0
Former stockholder litigation
Loss Contingencies [Line Items]
Loss contingencies, number of plaintiffs			6
Loss contingencies, new claims filed, number			9
Loss contingencies, claims amended, number					3
Loss contingencies, claims dismissed, number				3
Loss contingencies, damages sought, value	348.7	348.7
Former stockholder litigation | United States District Court for the Southern District of New York
Loss Contingencies [Line Items]
Loss contingencies, pending claims, number	5			5
Former stockholder litigation | United States Court of Appeals for the Ninth Circuit
Loss Contingencies [Line Items]
Loss contingencies, pending claims, number	1			1
Former stockholder litigation | RICO
Loss Contingencies [Line Items]
Loss contingencies, damages sought, value	$ 291.5	$ 291.5