Fair Value of Financial Instruments - Level 3 Quantitative Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Securities available-for-sale [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost (in hundredths)	30.00%	31.00%
Impaired Loans [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost (in hundredths)	6.00%	6.00%
Impaired Loans [Member] | Discounted Cash Flow Analysis [Member]
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost (in hundredths)	6.00%	4.00%
Other Real Estate Owned [Member] | Discounted Appraised Value [Member]
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost (in hundredths)	6.00%	6.00%