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
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	May. 29, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	$ 30,847,402		$ 30,847,402
Held to maturity, gross unrealized losses			140,278
Held-to-maturity Securities, Fair Value	30,730,644		30,730,644		$ 32,800,000	$ 0
Available-for-sale Securities, Gross Realized Losses	0	$ 176,000	47,000	$ 607,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	30,847,402		30,847,402
Held to maturity, gross unrealized losses			140,278
Held-to-maturity Securities, Fair Value	$ 30,730,644		$ 30,730,644