Accounting Policies and Basis of Presentation Accounting Policies and Basis of Presentation (Recently Adopted Accounting Standards) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2015	Dec. 31, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Qualified Affordable Housing Project Investments		$ 74,500	$ 57,100
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 2,400