Low-Income Housing Tax Credits (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) Fund	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Fund	Sep. 30, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) Fund
Investments in Affordable Housing Projects [Abstract]
Affordable Housing Program, Number of Investments | Fund	4		4			3
Amortization Method Qualified Affordable Housing Project Investments	$ 4,224,749.97		$ 4,224,749.97			$ 721,999.00
Qualified Affordable Housing Project Investments, Commitment	$ 3,664,704.00		3,664,704.00			$ 2,682,001.00
Affordable Housing Investment Commitments, Term Expiration Year	2032
Expected Affordable Housing Tax Credits, Amount					$ 298,900.00
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ 95,040.00	$ 93,528.59	$ 315,852.01	$ 301,777.76