Litigation (Details)	Jun. 02, 2014 claim
Loss Contingencies [Line Items]
Putative class actions were filed, number	13
Circuit Court for Baltimore City, Maryland
Loss Contingencies [Line Items]
Putative class actions were filed, number	10
Supreme Court of the State of New York, County of New York
Loss Contingencies [Line Items]
Putative class actions were filed, number	2
United States District Court of Maryland
Loss Contingencies [Line Items]
Putative class actions were filed, number	1