Fair Value Measurements - Information about Significant Unobservable Inputs (Level 3) Used in Valuation of Assets Measured at Fair Value on Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - Significant Unobservable Inputs (Level 3) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Appraised value of collateral | Minimum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	0.00%	0.00%
Appraised value of collateral | Maximum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	30.00%	30.00%
Appraised value of collateral | Impaired Loans
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of assets	$ 2,968	$ 29,135
Appraised value of property less costs to sell | Minimum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	0.00%	0.00%
Appraised value of property less costs to sell | Maximum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	10.00%	46.00%
Appraised value of property less costs to sell | Foreclosed Assets
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of assets	$ 2,564	$ 6,275
Discounted cash flows | Mortgage Servicing Rights, Net
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of assets	$ 46,291	$ 29,711