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Investments in Tax-Exempt Bonds (Tables)

6 Months Ended

Jun. 30, 2012

Investments in Tax Exempt Bonds [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]



		June 30, 2012
Description of Tax-Exempt Mortgage Revenue Bonds		Cost adjusted for pay-downs				Unrealized Gain				Unrealized Loss				Estimated Fair Value
Ashley Square ⁽¹⁾		$	5,284,000			$	206,902			$	—			$	5,490,902
Autumn Pines ⁽²⁾		12,301,431				779,055				—				13,080,486
Bella Vista ⁽¹⁾		6,600,000				—				(792		)		6,599,208
Bridle Ridge ⁽¹⁾		7,790,000				—				—				7,790,000
Brookstone ⁽¹⁾		7,446,192				1,390,962				—				8,837,154
Cross Creek ⁽¹⁾		5,983,564				1,953,181				—				7,936,745
Lost Creek ⁽¹⁾		15,927,201				3,271,131				—				19,198,332
Runnymede ⁽¹⁾		10,645,000				456,883				—				11,101,883
Southpark ⁽¹⁾		11,965,225				2,293,635				—				14,258,860
Woodlynn Village ⁽¹⁾		4,476,000				—				(61,948		)		4,414,052
Tax-exempt mortgage revenue bonds held in trust		$	88,418,613			$	10,351,749			$	(62,740	)		$	98,707,622

		June 30, 2012
Description of Tax-Exempt Mortgage Revenue Bonds		Cost adjusted for pay-downs				Unrealized Gain				Unrealized Loss				Estimated Fair Value
Arbors at Hickory Ridge		$	10,164,815			462,285				—				$	10,627,100
Iona Lakes		15,630,000				650,833				—				16,280,833
Woodland Park		15,662,000				—				(4,430,936		)		11,231,064
Tax-exempt mortgage revenue bonds		$	41,456,815			$	1,113,118			$	(4,430,936	)		$	38,138,997



		December 31, 2011
Description of Tax-Exempt Mortgage Revenue Bonds		Cost adjusted for pay-downs				Unrealized Gains				Unrealized Loss				Estimated Fair Value
Ashley Square ⁽¹⁾		$	5,308,000			$	—			$	—			$	5,308,000
Autumn Pines ⁽¹⁾		12,280,776				—				(152,094		)		12,128,682
Bella Vista ⁽¹⁾		6,650,000				—				(405,184		)		6,244,816
Bridle Ridge ⁽¹⁾		7,815,000				—				(469,056		)		7,345,944
Brookstone ⁽¹⁾		7,437,947				1,116,538				—				8,554,485
Cross Creek ⁽¹⁾		5,961,478				1,824,167				—				7,785,645
GMF-Madison Tower⁽²⁾		3,810,000				51,130				—				3,861,130
GMF-Warren/Tulane ⁽²⁾		11,815,000				321,722				—				12,136,722
Lost Creek ⁽¹⁾		16,051,048				1,962,587				—				18,013,635
Runnymede ⁽¹⁾		10,685,000				—				(434,452		)		10,250,548
Southpark ⁽¹⁾		11,925,483				1,431,637				—				13,357,120
Woodlynn Village ⁽¹⁾		4,492,000				—				(325,940		)		4,166,060
Tax-exempt mortgage revenue bonds held in trust		$	104,231,732			$	6,707,781			$	(1,786,726	)		$	109,152,787

		December 31, 2011
Description of Tax-Exempt Mortgage Revenue Bonds		Cost adjusted for pay-downs				Unrealized Gain				Unrealized Loss				Estimated Fair Value
Iona Lakes		$	15,720,000			$	160,658			$	—			$	15,880,658
Woodland Park		15,662,000				—				(5,000,093		)		10,661,907
Tax-exempt mortgage revenue bonds		$	31,382,000			$	160,658			$	(5,000,093	)		$	26,542,565