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Stock Repurchase Program (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Jan. 31, 2014
Dec. 31, 2013
Jul. 31, 2012
Class of Stock [Line Items]          
Stock Repurchase Program, Number of Shares Authorized to be Repurchased     1,000,000   1,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 768,000     29,000  
Treasury Stock          
Class of Stock [Line Items]          
Stock Repurchased and Retired During Period, Shares 0 261,000      
Stock Repurchased During Period, Value   $ 5.9