MBS Investments (Details) (USD $)						3 Months Ended				3 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Effective rate - minimum [Member]	Dec. 31, 2012 Effective rate - maximum [Member]	Dec. 31, 2012 Trust Portfolio--MBS Bonds [Member] Integer	Sep. 30, 2012 Trust Portfolio--MBS Bonds [Member]	Dec. 31, 2012 Trust Portfolio--MBS Bonds [Member] Effective rate - minimum [Member]	Dec. 31, 2012 Trust Portfolio--MBS Bonds [Member] Effective rate - maximum [Member]	Sep. 30, 2012 LIFERS [Member]	Dec. 31, 2012 LIFERS [Member] Trust Portfolio--MBS Bonds [Member]	Dec. 31, 2012 SPEARS [Member] Trust Portfolio--MBS Bonds [Member]	Dec. 31, 2012 10% adverse [Member] Effective rate - minimum [Member]	Dec. 31, 2012 10% adverse [Member] Effective rate - maximum [Member]	Sep. 30, 2012 10% adverse [Member] Trust Portfolio--MBS Bonds [Member]	Dec. 31, 2012 10% adverse [Member] Trust Portfolio--MBS Bonds [Member] Effective rate - minimum [Member]	Dec. 31, 2012 10% adverse [Member] Trust Portfolio--MBS Bonds [Member] Effective rate - maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Ownership Percentage						100.00%				100.00%
Number of Available for Sale Securities, Mortgage Backed Securities						5
Tolerable Range of Difference in Valuation	0.00%
Effective rate				5.70%	8.40%			3.60%	5.40%				6.20%	9.30%		4.00%	5.90%
Available for Sale Securities, not Including Premiums						$ 31,620,000
TOB Financing			17,700,000								6,500,000	25,100,000
Adverse change rate	10.00%					10.00%
Available-for-sale Securities, Gross Unrealized Losses		$ 4,289,886	$ 5,000,093				$ (413,665)								$ 2,400,000