Investment and Mortgage-Backed Securities, Held to Maturity (Schedule of investment and mortgage-backed securities held to maturity) (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, gross unrealized gains				$ 22,600
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	$ 27,483,390	$ 27,483,390		29,873,098
Held to maturity, gross unrealized losses		0		214,418
Held-to-maturity Securities, Fair Value	28,090,167	28,090,167		29,681,280
Available-for-sale Securities, Gross Realized Losses	0	0	$ 47,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	27,483,390	27,483,390		29,873,098
Held to maturity, gross unrealized gains		606,777		22,600
Held to maturity, gross unrealized losses		0		214,418
Held-to-maturity Securities, Fair Value	$ 28,090,167	$ 28,090,167		$ 29,681,280