Low-Income Housing Tax Credits (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($) Fund	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Fund	Jun. 30, 2014 USD ($)	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	$ 4,284,500.00		$ 4,284,500.00			$ 721,999.00
Qualified Affordable Housing Project Investments, Commitment	$ 3,681,001.00		3,681,001.00			$ 2,682,001.00
Affordable Housing Investment Commitments, Term Expiration Year	2032
Expected Affordable Housing Tax Credits, Amount					$ 314,289.00
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ 102,392.00	$ 143,470.59	$ 220,812.01	$ 208,249.17