Commitments and Contingencies (Narrative) (Details)		1 Months Ended	6 Months Ended
	Dec. 11, 2009 plaintiff claim	Nov. 30, 2015 claim	Jun. 30, 2016
Commitments and Contingencies [Abstract]
Participant's retirement age			65 years
Number of plantiffs | plaintiff	2
New claims	2	3
Claims Dismissed		2