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Mortgage Revenue Bonds - Schedule of Investments in MRBs (Details) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Mortgage Revenue Bonds Held In Trust [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances $ 874,539,714 $ 825,040,234
Cumulative Unrealized Gain 49,562,056 58,971,739
Cumulative Unrealized Loss (1,633,606) (981,187)
Estimated Fair Value 922,468,164 883,030,786
Mortgage Revenue Bonds Held In Trust [Member] | The Safford [Member] | Series A [Member] | AZ [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 9,989,318 [1] 7,667,299 [2]
Cumulative Unrealized Gain 2,039,618 [1] 2,717,033 [2]
Estimated Fair Value 12,028,936 [1] 10,384,332 [2]
Mortgage Revenue Bonds Held In Trust [Member] | 40rty on Colony - Series P [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 5,963,574 [1] 5,964,008 [2]
Cumulative Unrealized Gain 638,636 [1] 739,204 [2]
Estimated Fair Value 6,602,210 [1] 6,703,212 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Courtyard [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 9,748,189 [3] 9,774,107 [4]
Cumulative Unrealized Gain 685,729 [3] 845,146 [4]
Estimated Fair Value 10,433,918 [3] 10,619,253 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Glenview Apartments [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 4,296,391 [5] 4,312,025 [6]
Cumulative Unrealized Gain 203,899 [5] 298,507 [6]
Estimated Fair Value 4,500,290 [5] 4,610,532 [6]
Mortgage Revenue Bonds Held In Trust [Member] | Harmony Court Bakersfield [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 3,554,325 [3] 3,563,775 [4]
Cumulative Unrealized Gain 218,766 [3] 275,305 [4]
Estimated Fair Value 3,773,091 [3] 3,839,080 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Harmony Terrace [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 6,580,876 [3] 6,598,285 [4]
Cumulative Unrealized Gain 466,164 [3] 573,928 [4]
Estimated Fair Value 7,047,040 [3] 7,172,213 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Harden Ranch [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 6,331,241 [7] 6,355,567 [8]
Cumulative Unrealized Gain 339,666 [7] 441,345 [8]
Estimated Fair Value 6,670,907 [7] 6,796,912 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Las Palmas II [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 1,612,276 [3] 1,616,607 [4]
Cumulative Unrealized Gain 103,208 [3] 128,930 [4]
Estimated Fair Value 1,715,484 [3] 1,745,537 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Lutheran Gardens [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [9],[10] 10,352,000  
Cumulative Unrealized Loss [9],[10] (37,415)  
Estimated Fair Value [9],[10] 10,314,585  
Mortgage Revenue Bonds Held In Trust [Member] | Montclair Apartments [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 2,327,595 [5] 2,336,065 [4]
Cumulative Unrealized Gain 134,203 [5] 170,291 [4]
Estimated Fair Value 2,461,798 [5] 2,506,356 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Montecito at Williams Ranch Apartments [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 7,425,704 [1] 7,442,435 [2]
Cumulative Unrealized Gain 712,176 [1] 846,333 [2]
Estimated Fair Value 8,137,880 [1] 8,288,768 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Montevista [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 6,595,473 [1] 6,607,973 [2]
Cumulative Unrealized Gain 826,864 [1] 992,675 [2]
Estimated Fair Value 7,422,337 [1] 7,600,648 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Ocotillo Springs [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 3,480,813  
Cumulative Unrealized Loss [1] (129,021)  
Estimated Fair Value [1] 3,351,792  
Mortgage Revenue Bonds Held In Trust [Member] | Ocotillo Springs [Member] | Series A-1 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 498,442  
Cumulative Unrealized Gain [1] 83,372  
Estimated Fair Value [1] 581,814  
Mortgage Revenue Bonds Held In Trust [Member] | CCBA Senior Garden Apartments [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 3,748,159  
Cumulative Unrealized Gain [1] 78,327  
Estimated Fair Value [1] 3,826,486  
Mortgage Revenue Bonds Held In Trust [Member] | Residency at Empire - Series BB-1 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 14,116,406 [1] 14,117,540 [2]
Cumulative Unrealized Gain 788,100 [1] 1,004,021 [2]
Estimated Fair Value 14,904,506 [1] 15,121,561 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Residency at Empire - Series BB-2 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 4,000,000 [1] 4,000,000 [2]
Cumulative Unrealized Gain 258,431 [1] 320,446 [2]
Estimated Fair Value 4,258,431 [1] 4,320,446 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Residency at Empire - Series BB-3 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 9,555,000 [1] 5,055,000 [2]
Cumulative Unrealized Gain 466,050 [1] 575,709 [2]
Estimated Fair Value 10,021,050 [1] 5,630,709 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur - Series J-1 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 9,083,796 [1] 9,085,429 [2]
Cumulative Unrealized Gain 15,757 [1] 181,504 [2]
Estimated Fair Value 9,099,553 [1] 9,266,933 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur - Series J-2 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 7,500,000 [1] 7,500,000 [2]
Cumulative Unrealized Gain 82,961 [1] 222,445 [2]
Estimated Fair Value 7,582,961 [1] 7,722,445 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur - Series J-3 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 16,100,000 [1] 12,300,000 [2]
Cumulative Unrealized Gain 548,641 [1] 697,895 [2]
Estimated Fair Value 16,648,641 [1] 12,997,895 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur - Series J-5 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 1,000,000  
Estimated Fair Value [1] 1,000,000  
Mortgage Revenue Bonds Held In Trust [Member] | Solano Vista [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 2,606,974  
Cumulative Unrealized Gain [1] 286,892  
Estimated Fair Value [1] 2,893,866  
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Mayer [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 29,559,238 [1] 29,560,945 [2]
Estimated Fair Value 29,559,238 [1] 29,560,945 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Mayer [Member] | Series M [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 11,500,000  
Estimated Fair Value [1] 11,500,000  
Mortgage Revenue Bonds Held In Trust [Member] | San Vicente [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 3,324,428 [3] 3,333,357 [4]
Cumulative Unrealized Gain 212,810 [3] 265,848 [4]
Estimated Fair Value 3,537,238 [3] 3,599,205 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Santa Fe Apartments [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 2,819,794 [5] 2,830,055 [6]
Cumulative Unrealized Gain 167,405 [5] 206,301 [6]
Estimated Fair Value 2,987,199 [5] 3,036,356 [6]
Mortgage Revenue Bonds Held In Trust [Member] | Seasons at Simi Valley [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 4,069,240 [3] 4,083,273 [4]
Cumulative Unrealized Gain 374,446 [3] 443,901 [4]
Estimated Fair Value 4,443,686 [3] 4,527,174 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Seasons Lakewood [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 7,010,064 [3] 7,028,608 [4]
Cumulative Unrealized Gain 496,566 [3] 611,358 [4]
Estimated Fair Value 7,506,630 [3] 7,639,966 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Seasons San Juan Capistrano [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 11,802,659 [3] 11,833,880 [4]
Cumulative Unrealized Gain 800,970 [3] 992,473 [4]
Estimated Fair Value 12,603,629 [3] 12,826,353 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Summerhill [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 6,120,491 [3] 6,136,763 [4]
Cumulative Unrealized Gain 288,115 [3] 381,019 [4]
Estimated Fair Value 6,408,606 [3] 6,517,782 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Sycamore Walk [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 3,368,481 [3] 3,380,901 [4]
Cumulative Unrealized Gain 109,717 [3] 226,216 [4]
Estimated Fair Value 3,478,198 [3] 3,607,117 [4]
Mortgage Revenue Bonds Held In Trust [Member] | The Village at Madera [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 2,939,703 [3] 2,947,519 [4]
Cumulative Unrealized Gain 189,528 [3] 227,699 [4]
Estimated Fair Value 3,129,231 [3] 3,175,218 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Tyler Park Townhomes [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 5,511,871 [7] 5,533,307 [8]
Cumulative Unrealized Gain 66,935 [7] 119,693 [8]
Estimated Fair Value 5,578,806 [7] 5,653,000 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Village at Hanford Square [Member] | Series H [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 10,400,000 [1] 10,400,000 [2]
Cumulative Unrealized Gain 907,760 [1] 1,073,808 [2]
Estimated Fair Value 11,307,760 [1] 11,473,808 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Vineyard Gardens | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 3,866,389 [1] 3,874,962 [2]
Cumulative Unrealized Gain 389,493 [1] 461,663 [2]
Estimated Fair Value 4,255,882 [1] 4,336,625 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Westside Village Market [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 3,601,998 [7] 3,616,007 [8]
Cumulative Unrealized Gain 170,597 [7] 223,459 [8]
Estimated Fair Value 3,772,595 [7] 3,839,466 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Handsel Morgan Village Apartments [Member] | GA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 2,150,000  
Cumulative Unrealized Gain [1] 253,792  
Estimated Fair Value [1] 2,403,792  
Mortgage Revenue Bonds Held In Trust [Member] | Maryalice Circle Apartments [Member] | GA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 5,900,000 [1] 5,900,000 [2]
Cumulative Unrealized Gain 751,174 [1] 880,643 [2]
Estimated Fair Value 6,651,174 [1] 6,780,643 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Copper Gate Apartments [Member] | IN [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 4,780,000 [7] 4,780,000 [8],[11]
Cumulative Unrealized Loss [8],[11]   (5)
Estimated Fair Value 4,780,000 [7] 4,779,995 [8],[11]
Mortgage Revenue Bonds Held In Trust [Member] | Renaissance [Member] | Series A [Member] | LA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 10,388,916 [5] 10,429,392 [6]
Cumulative Unrealized Gain 860,164 [5] 1,221,077 [6]
Estimated Fair Value 11,249,080 [5] 11,650,469 [6]
Mortgage Revenue Bonds Held In Trust [Member] | Live 929 Apartments [Member] | Series 2022A [Member] | MD [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 58,390,083 [1] 58,333,646 [2]
Cumulative Unrealized Gain 2,957,716 [1] 3,275,636 [2]
Estimated Fair Value 61,347,799 [1] 61,609,282 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Meadow Valley [Member] | MI [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [2],[12]   20,863,114
Cumulative Unrealized Loss [2],[12]   (920,148)
Estimated Fair Value [2],[12]   19,942,966
Mortgage Revenue Bonds Held In Trust [Member] | Meadow Valley [Member] | Series 2022A [Member] | MI [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1],[13] 25,036,225  
Cumulative Unrealized Loss [1],[13] (1,393,024)  
Estimated Fair Value [1],[13] 23,643,201  
Mortgage Revenue Bonds Held In Trust [Member] | Jackson Manor Apartments [member] | MS [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 4,813,818 [1],[14] 4,824,474 [2]
Cumulative Unrealized Gain 105,024 [1],[14] 209,082 [2]
Estimated Fair Value 4,918,842 [1],[14] 5,033,556 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Village Point [Member] | NJ [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [14] 23,000,000  
Cumulative Unrealized Loss [14] (74,146)  
Estimated Fair Value [14] 22,925,854  
Mortgage Revenue Bonds Held In Trust [Member] | Lynnhaven Apartments [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [11],[15]   10,352,000
Cumulative Unrealized Loss [11],[15]   (30,994)
Estimated Fair Value [11],[15]   10,321,006
Mortgage Revenue Bonds Held In Trust [Member] | Silver Moon [Member] | Series A [Member] | NM [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 7,460,511 [5] 7,480,455 [6]
Cumulative Unrealized Gain 799,556 [5] 928,841 [6]
Estimated Fair Value 8,260,067 [5] 8,409,296 [6]
Mortgage Revenue Bonds Held In Trust [Member] | Village at Avalon [Member] | NM [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 15,773,357 [16] 15,808,184 [17]
Cumulative Unrealized Gain 1,775,826 [16] 1,962,627 [17]
Estimated Fair Value 17,549,183 [16] 17,770,811 [17]
Mortgage Revenue Bonds Held In Trust [Member] | Columbia Gardens [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 12,301,761 [3] 12,351,218 [4]
Cumulative Unrealized Gain 601,976 [3] 807,633 [4]
Estimated Fair Value 12,903,737 [3] 13,158,851 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Companion at Thornhill Apartments [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 10,601,493 [3] 10,639,506 [4]
Cumulative Unrealized Gain 438,686 [3] 598,197 [4]
Estimated Fair Value 11,040,179 [3] 11,237,703 [4]
Mortgage Revenue Bonds Held In Trust [Member] | The Ivy Apartments [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 30,565,536 [1] 30,567,832 [2]
Cumulative Unrealized Gain 1,499,111 [1] 1,933,208 [2]
Estimated Fair Value 32,064,647 [1] 32,501,040 [2]
Mortgage Revenue Bonds Held In Trust [Member] | The Palms at Premier Park Apartment [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 17,803,781 [7] 17,872,527 [8]
Cumulative Unrealized Gain 246,195 [7] 427,099 [8]
Estimated Fair Value 18,049,976 [7] 18,299,626 [8]
Mortgage Revenue Bonds Held In Trust [Member] | The Park at Sondrio [Member] | Series 2022A [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 38,100,000 [1] 38,100,000 [2]
Cumulative Unrealized Gain 2,119,463 [1] 2,682,964 [2]
Estimated Fair Value 40,219,463 [1] 40,782,964 [2]
Mortgage Revenue Bonds Held In Trust [Member] | The Park at Vietti [Member] | Series 2022A [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 26,985,000 [1] 26,985,000 [2]
Cumulative Unrealized Gain 1,570,008 [1] 1,972,695 [2]
Estimated Fair Value 28,555,008 [1] 28,957,695 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Village at River's Edge [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 9,544,429 [3] 9,566,110 [4]
Cumulative Unrealized Gain 1,167,655 [3] 1,000,545 [4]
Estimated Fair Value 10,712,084 [3] 10,566,655 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Willow Run [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 12,130,581 [3] 12,180,025 [4]
Cumulative Unrealized Gain 634,209 [3] 817,941 [4]
Estimated Fair Value 12,764,790 [3] 12,997,966 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Wiindsor Shores Apartments [Member] | Series A [Member] | SC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 21,545,000 [1] 21,545,000 [2]
Cumulative Unrealized Gain 1,216,171 [1] 1,530,085 [2]
Estimated Fair Value 22,761,171 [1] 23,075,085 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Arbors at Hickory Ridge [Member] | TN [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 10,372,503 [7] 10,417,646 [8]
Cumulative Unrealized Gain 1,585,054 [7] 1,805,985 [8]
Estimated Fair Value 11,957,557 [7] 12,223,631 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at Copperfield [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 13,338,421 [1] 13,378,386 [2]
Cumulative Unrealized Gain 753,400 [1] 983,586 [2]
Estimated Fair Value 14,091,821 [1] 14,361,972 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at the Crest [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 8,728,170 [7] 8,762,826 [8]
Cumulative Unrealized Gain 770,799 [7] 909,437 [8]
Estimated Fair Value 9,498,969 [7] 9,672,263 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at the Oaks [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 7,064,747 [7] 7,091,928 [8]
Cumulative Unrealized Gain 555,435 [7] 666,990 [8]
Estimated Fair Value 7,620,182 [7] 7,758,918 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at the Parkway [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 12,229,345 [5] 12,270,653 [6]
Cumulative Unrealized Gain 603,221 [5] 830,179 [6]
Estimated Fair Value 12,832,566 [5] 13,100,832 [6]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at Wilcrest [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 5,054,991 [1] 5,070,137 [2]
Cumulative Unrealized Gain 262,967 [1] 313,010 [2]
Estimated Fair Value 5,317,958 [1] 5,383,147 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at Wood Hollow [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 38,382,434 [1] 38,497,436 [2]
Cumulative Unrealized Gain 2,082,233 [1] 2,648,201 [2]
Estimated Fair Value 40,464,667 [1] 41,145,637 [2]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar in 09 [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 6,100,131 [7] 6,123,600 [8]
Cumulative Unrealized Gain 496,237 [7] 593,430 [8]
Estimated Fair Value 6,596,368 [7] 6,717,030 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar on the Boulevard [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 14,869,385 [7] 14,928,425 [8]
Cumulative Unrealized Gain 1,120,753 [7] 1,346,449 [8]
Estimated Fair Value 15,990,138 [7] 16,274,874 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar on the Hills [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 4,836,683 [7] 4,855,291 [8]
Cumulative Unrealized Gain 393,457 [7] 470,520 [8]
Estimated Fair Value 5,230,140 [7] 5,325,811 [8]
Mortgage Revenue Bonds Held In Trust [Member] | Bruton Apartments [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 17,179,304 [3] 17,220,941 [4],[11]
Cumulative Unrealized Loss [4],[11]   (13,366)
Estimated Fair Value 17,179,304 [3] 17,207,575 [4],[11]
Mortgage Revenue Bonds Held In Trust [Member] | Concord at Gulfgate [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 18,135,132 [3] 18,190,721 [4]
Cumulative Unrealized Gain 1,517,470 [3] 1,807,038 [4]
Estimated Fair Value 19,652,602 [3] 19,997,759 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Concord at Little York [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 12,704,518 [3] 12,743,460 [4]
Cumulative Unrealized Gain 1,028,673 [3] 1,302,221 [4]
Estimated Fair Value 13,733,191 [3] 14,045,681 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Concord at Williamcrest [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 19,680,659 [3] 19,740,985 [4]
Cumulative Unrealized Gain 1,700,215 [3] 2,017,280 [4]
Estimated Fair Value 21,380,874 [3] 21,758,265 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Crossing at 1415 [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 7,059,848 [3] 7,082,698 [4]
Cumulative Unrealized Gain 422,501 [3] 565,843 [4]
Estimated Fair Value 7,482,349 [3] 7,648,541 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Decatur-Angle [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 21,589,111 [3] 21,646,255 [4],[11]
Cumulative Unrealized Loss [4],[11]   (16,674)
Estimated Fair Value 21,589,111 [3] 21,629,581 [4],[11]
Mortgage Revenue Bonds Held In Trust [Member] | Esperanza at Palo Alto [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 18,708,566 [3] 18,751,278 [4]
Cumulative Unrealized Gain 2,101,382 [3] 2,480,537 [4]
Estimated Fair Value 20,809,948 [3] 21,231,815 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Heights at 515 [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 6,463,412 [3] 6,484,332 [4]
Cumulative Unrealized Gain 466,027 [3] 602,199 [4]
Estimated Fair Value 6,929,439 [3] 7,086,531 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Heritage Square [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 10,150,390 [5] 10,186,405 [6]
Cumulative Unrealized Gain 456,422 [5] 606,579 [6]
Estimated Fair Value 10,606,812 [5] 10,792,984 [6]
Mortgage Revenue Bonds Held In Trust [Member] | Oaks at Georgetown [Member] | Series A [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 11,759,740 [3] 11,790,848 [4]
Cumulative Unrealized Gain 655,561 [3] 838,472 [4]
Estimated Fair Value 12,415,301 [3] 12,629,320 [4]
Mortgage Revenue Bonds Held In Trust [Member] | Runnymede [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [15]   23,000,000
Cumulative Unrealized Gain [15]   192,788
Estimated Fair Value [15]   23,192,788
Mortgage Revenue Bonds Held In Trust [Member] | Southpark [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [1] 11,150,461  
Cumulative Unrealized Gain [1] 1,149,539  
Estimated Fair Value [1] 12,300,000  
Mortgage Revenue Bonds Held In Trust [Member] | 15 West Apartments [Member] | WA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 9,350,364 [3] 9,371,808 [4]
Cumulative Unrealized Gain 1,292,182 [3] 1,478,567 [4]
Estimated Fair Value 10,642,546 [3] 10,850,375 [4]
Mortgage Revenue Bonds [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 19,023,873 44,414,740
Cumulative Unrealized Gain 1,253,560 3,290,695
Cumulative Unrealized Loss   (60,926)
Estimated Fair Value 20,277,433 47,644,509
Mortgage Revenue Bonds [Member] | CCBA Senior Garden Apartments [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances   3,757,268
Cumulative Unrealized Gain   158,840
Estimated Fair Value   3,916,108
Mortgage Revenue Bonds [Member] | Ocotillo Springs Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances [18]   3,489,096
Cumulative Unrealized Loss [18]   (59,805)
Estimated Fair Value [18]   3,429,291
Mortgage Revenue Bonds [Member] | Ocotillo Springs Series A 1 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances   499,117
Cumulative Unrealized Gain   95,386
Estimated Fair Value   594,503
Mortgage Revenue Bonds [Member] | Residency at Empire - Series BB-2 [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances   1,000,000
Estimated Fair Value   1,000,000
Mortgage Revenue Bonds [Member] | Solano Vista [Member] | Series A [Member] | CA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances   2,611,955
Cumulative Unrealized Gain   338,125
Estimated Fair Value   2,950,080
Mortgage Revenue Bonds [Member] | Handsel Morgan Village Apartments [Member] | GA [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances   2,150,000
Cumulative Unrealized Gain   300,188
Estimated Fair Value   2,450,188
Mortgage Revenue Bonds [Member] | Brookstone [Member] | IL [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 7,213,953  
Cumulative Unrealized Gain 1,123,250  
Estimated Fair Value 8,337,203  
Mortgage Revenue Bonds [Member] | Greens Property [Member] | Series B [Member] | NC [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances   7,229,475
Cumulative Unrealized Gain   1,071,177
Estimated Fair Value   8,300,652
Mortgage Revenue Bonds [Member] | Provision Center 2014-1 [Member] | TN [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 196,577 926,475
Estimated Fair Value 196,577 926,475
Mortgage Revenue Bonds [Member] | Avistar at the Crest [Member] | Series B [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 716,636 718,332
Cumulative Unrealized Gain 40,405 49,845
Estimated Fair Value 757,041 768,177
Mortgage Revenue Bonds [Member] | Avistar at the Oaks [Member] | Series B [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 525,126 526,318
Cumulative Unrealized Gain 28,014 35,066
Estimated Fair Value 553,140 561,384
Mortgage Revenue Bonds [Member] | Avistar at the Parkway [Member] | Series B [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 122,573 122,701
Cumulative Unrealized Gain 16,786 19,352
Estimated Fair Value 139,359 142,053
Mortgage Revenue Bonds [Member] | Avistar in 09 [Member] | Series B [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 433,181 434,165
Cumulative Unrealized Gain 23,109 28,926
Estimated Fair Value 456,290 463,091
Mortgage Revenue Bonds [Member] | Avistar on the Boulevard [Member] | Series B [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 425,827 426,835
Cumulative Unrealized Gain 21,996 27,507
Estimated Fair Value 447,823 454,342
Mortgage Revenue Bonds [Member] | Runnymede [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances 9,390,000 9,390,000 [19]
Cumulative Unrealized Loss [19]   (1,121)
Estimated Fair Value $ 9,390,000 9,388,879 [19]
Mortgage Revenue Bonds [Member] | Southpark [Member] | TX [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Cost Adjusted for Paydowns and Allowances   11,133,003
Cumulative Unrealized Gain   1,166,283
Estimated Fair Value   $ 12,299,286
[1] MRB held by Mizuho Capital Markets, LLC in a debt financing transaction, Note 13.
[2] MRB held by Mizuho Capital Markets, LLC in a debt financing transaction, Note 13.
[3] MRB owned by ATAX TEBS IV, LLC (M45 TEBS), Note 13. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[4] MRB owned by ATAX TEBS IV, LLC (M45 TEBS), Note 13. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[5] MRB owned by ATAX TEBS III, LLC (M33 TEBS), Note 13. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[6] MRB owned by ATAX TEBS III, LLC (M33 TEBS), Note 13. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[7] MRB owned by ATAX TEBS II, LLC (M31 TEBS), Note 13. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[8] MRB owned by ATAX TEBS II, LLC (M31 TEBS), Note 13. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[9] As of the date presented, the Partnership determined that the unrealized loss on the MRB is a result of increasing market interest rates and is not considered a credit loss. As of March 31, 2024, the MRB has been in an unrealized loss position for more than 12 months.
[10] MRB held by Barclays Capital Inc. in a debt financing transaction, Note 13.
[11] As of the date presented, the Partnership determined that the unrealized loss on the MRB is a result of increasing market interest rates and is not considered a credit loss. As of December 31, 2023, the MRB has been in an unrealized loss position for less than 12 months.
[12] The Partnership has a remaining MRB funding commitment of approximately $23.2 million as of December 31, 2023. The MRB and the unfunded MRB commitment are accounted for as available-for-sale securities and reported at fair value. The reported unrealized loss includes the unrealized loss on the current MRB carrying value (based on current fair value) as well as the unrealized loss on the Partnership’s remaining funding commitment outstanding as of December
31, 2023 (also based on current fair value). The Partnership determined the unrealized loss is a result of increasing market interest rates and that the cumulative unrealized loss is not considered a credit loss. As of December 31, 2023, the MRB has been in an unrealized loss position for more than 12 months.
[13] The Partnership has a remaining MRB funding commitment of approximately $19.1 million as of March 31, 2024. The MRB and the unfunded MRB commitment are accounted for as available-for-sale securities and reported at fair value. The reported unrealized loss includes the unrealized loss on the current MRB carrying value (based on current fair value) as well as the unrealized loss on the Partnership’s remaining funding commitment outstanding as of March 31, 2024 (also based on current fair value). The Partnership determined the unrealized loss is a result of increasing market interest rates and that the cumulative unrealized loss is not considered a credit loss. As of March 31, 2024, the MRB has been in an unrealized loss position for more than 12 months.
[14] As of the date presented, the Partnership determined that the unrealized loss on the MRB is a result of increasing market interest rates and is not considered a credit loss. As of March 31, 2024, the MRB has been in an unrealized loss position for less than 12 months.
[15] MRB held by Barclays Capital Inc. in a debt financing transaction, Note 13.
[16] MRB held by Morgan Stanley in a debt financing transaction, Note 13.
[17] MRB held by Morgan Stanley in a debt financing transaction, Note 13.
[18] As of the date presented, the Partnership determined that the unrealized loss on the MRB is a result of increasing market interest rates and is not considered a credit loss. As of December 31, 2023, the MRB has been in an unrealized loss position for more than 12 months.
[19] As of the date presented, the Partnership determined that the unrealized loss on the MRB is a result of increasing market interest rates and is not considered a credit loss. As of December 31, 2023, the MRB has been in an unrealized loss position for less than 12 months.