Commitments and Contingencies Commitments and Contingencies (SDNY and Maryland Derivative Actions) (Details) (Subsequent Event [Member])	0 Months Ended	3 Months Ended	1 Months Ended
	Feb. 20, 2015 plaintiff	Feb. 02, 2015 lawsuit	Jan. 16, 2015 lawsuit
SDNY Derivative Actions [Member]
Loss Contingencies [Line Items]
Number of shareholder derivative actions		6
Number of plaintiffs	3
Maryland Derivative Actions [Member]
Loss Contingencies [Line Items]
Number of shareholder derivative actions			2