Summary Of Term A/B Trust Financings (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Short Term Debt [Line Items]
Debt financing	$ 598,123,706	$ 495,383,033
Term A/B Trust [Member]
Short Term Debt [Line Items]
Debt financing	105,655,623
Term A/B Trust [Member] | San Vicente Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 3,106,826
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | San Vicente Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 1,532,587
Years Acquired	2017
Stated Maturities	2018-06
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Las Palmas Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 1,503,641
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Las Palmas Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 1,479,573
Years Acquired	2017
Stated Maturities	2018-06
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | The Village At Madera Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 2,740,786
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | The Village At Madera Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 1,443,242
Years Acquired	2017
Stated Maturities	2018-07
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Harmony Court Bakers field Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 3,315,877
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Harmony Court Bakers field Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 1,676,521
Years Acquired	2017
Stated Maturities	2018-07
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Summerhill Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 5,721,078
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Summerhill Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 2,837,225
Years Acquired	2017
Stated Maturities	2018-07
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Courtyard Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 9,118,911
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Courtyard Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 5,242,064
Years Acquired	2017
Stated Maturities	2018-07
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Seasons Lakewood Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 6,545,788
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Seasons Lakewood Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 4,427,691
Years Acquired	2017
Stated Maturities	2018-08
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Seasons San Juan Capistrano Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 11,032,559
Years Acquired	2017
Stated Maturities	2022-02
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Seasons San Juan Capistrano Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 5,535,047
Years Acquired	2017
Stated Maturities	2018-08
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Avistar at Wood Hollow [Member]
Short Term Debt [Line Items]
Debt financing	$ 26,821,903
Years Acquired	2017
Stated Maturities	2027-02
Fixed Interest Rate	4.46%
Term A/B Trust [Member] | Avistar at Wilcrest [Member]
Short Term Debt [Line Items]
Debt financing	$ 3,165,250
Years Acquired	2017
Stated Maturities	2027-02
Fixed Interest Rate	4.46%
Term A/B Trust [Member] | Avistar at Copperfield [Member]
Short Term Debt [Line Items]
Debt financing	$ 8,409,054
Years Acquired	2017
Stated Maturities	2027-02
Fixed Interest Rate	4.46%
Term A/B Trust [Member]
Short Term Debt [Line Items]
Debt financing	$ 28,243,418
Term A/B Trust [Member] | Oaks at Georgetown - Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 11,085,441
Years Acquired	2017
Stated Maturities	2022-03
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Oaks at Georgetown - Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 4,681,745
Years Acquired	2017
Stated Maturities	2018-08
Fixed Interest Rate	3.76%
Term A/B Trust [Member] | Harmony Terrace - Series A [Member]
Short Term Debt [Line Items]
Debt financing	$ 6,198,322
Years Acquired	2017
Stated Maturities	2022-03
Fixed Interest Rate	3.89%
Term A/B Trust [Member] | Harmony Terrace - Series B [Member]
Short Term Debt [Line Items]
Debt financing	$ 6,277,910
Years Acquired	2017
Stated Maturities	2018-08
Fixed Interest Rate	3.76%