Investment Securities (Tables)

12 Months Ended

Dec. 31, 2015

Investment Securities [Abstract]

Schedule of amortized costs and fair values of investment securities available for sale

	December 31, 2015
	Gross Unrealized
	Amortized							Fair
	Cost		Gains		Losses			Value
Government-sponsored mortgage-backed	$	4,290,680	$	66,350	$	(44,581	)	$	4,312,449
Municipals, tax-exempt		4,916,379		140,335		(17,267	)		5,039,447
Municipals, taxable		1,308,298		27,657		—			1,335,955
Total investment securities available for sale	$	10,515,357	$	234,342	$	(61,848	)	$	10,687,851

	December 31, 2014
	Gross Unrealized
	Amortized							Fair
	Cost		Gains		Losses			Value
Government-sponsored mortgage-backed	$	7,597,334	$	122,491	$	(118,308	)	$	7,601,517
Collateralized mortgage-backed		2,040,478		—		(57,518	)		1,982,960
Municipals, tax-exempt		4,658,532		68,643		(30,179	)		4,696,996
Municipals, taxable		1,317,433		16,620		—			1,334,053
Total investment securities available for sale	$	15,613,777	$	207,754	$	(206,005	)	$	15,615,526

Securities with unrealized losses

	Securities in an					Securities in an
	Unrealized					Unrealized
	Loss Position for					Loss Position for
	Less than					More than
	12 Months					12 Months					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Government-sponsored mortgage-backed	$	627,542		$	5,569	$	764,462		$	39,012	$	1,392,004		$	44,581
Municipals, tax-exempt		323,796			6,249		1,074,440			11,018		1,398,236			17,267
Total temporarily impaired securities	$	951,338		$	11,818	$	1,838,902		$	50,030	$	2,790,240		$	61,848

	Securities in an						Securities in an
	Unrealized						Unrealized
	Loss Position for						Loss Position for
	Less than						More than
	12 Months						12 Months				Total
	Fair			Unrealized			Fair		Unrealized		Fair		Unrealized
	Value			Losses			Value		Losses		Value		Losses
Government-sponsored mortgage-backed		$	—		$	—	$	3,247,141	$	118,308	$	3,189,623	$	118,308
Collateralized mortgage-backed			—			—		1,982,960		57,518		2,040,478		57,518
Municipals, tax-exempt			—			—		1,072,090		30,179		1,072,090		30,179
Total temporarily impaired securities		$	—		$	—	$	6,302,191	$	206,005	$	6,302,191	$	206,005

Amortized costs and fair values of investment securities available for sale by contractual maturity

	December 31, 2015
	Amortized		Fair
	Cost		Value
Due within one year	$	—	$	—
Due after one through three years		—		—
Due after three through five years		—		—
Due after five through ten years		1,308,298		1,335,955
Due after ten years		9,207,059		9,351,896
Total investment securities	$	10,515,357	$	10,687,851