Mortgage-Backed Securities Terms of MBS (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Available for Sale Securities, not Including Premiums			59,308,398
Trust Portfolio--MBS Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for Sale Securities, not Including Premiums	14,765,000
Standard & Poor's, AAA Rating [Member] | Trust Portfolio--MBS Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Instrument, Credit Rating	“AAA”	[1]	“AAA”	[1]
Available for Sale Securities, not Including Premiums	5,000,000
Debt Instrument, Weighted Average Maturity Date	Jul. 01, 2032
Debt, Weighted Average Interest Rate	4.60%
Standard & Poor's, AA Rating [Member] | Trust Portfolio--MBS Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Instrument, Credit Rating	“AA”	[1]	“AA”	[1]
Available for Sale Securities, not Including Premiums	$ 9,765,000
Debt Instrument, Weighted Average Maturity Date	Jul. 09, 2036
Debt, Weighted Average Interest Rate	4.20%

[1] (1) MBS are reported based on the lowest rating issued by a Rating Agency, if more than one rating is issued on the security, at the date presented.