Debt (Fixed Charge Metrics) (Details)
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Debt Disclosure [Abstract]          
Covenant Limit 1.75 1.75 1.75 1.75 1.75
Actual FCCR 2.36 2.58 2.70 2.65 2.69