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Mortgage Revenue Bonds - Schedule of Investments in MRBs (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Mortgage Revenue Bonds Held In Trust [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances $ 784,224,320 $ 718,413,130  
Cumulative Unrealized Gain 64,481,526 45,127,126  
Cumulative Unrealized Loss (173,588) (331,311)  
Estimated Fair Value 848,532,258 763,208,945  
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 9,849,947 [1] 9,874,603 [2]  
Cumulative Unrealized Gain 1,087,127 [1] 888,242 [2]  
Estimated Fair Value 10,937,074 [1] 10,762,845 [2]  
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 4,357,607 [3] 4,372,370 [4]  
Cumulative Unrealized Gain 371,120 [3] 309,570 [4]  
Estimated Fair Value 4,728,727 [3] 4,681,940 [4]  
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 3,591,428 [1] 3,600,418 [2]  
Cumulative Unrealized Gain 347,292 [1] 274,456 [2]  
Estimated Fair Value 3,938,720 [1] 3,874,874 [2]  
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 6,649,226 [1] 6,665,787 [2]  
Cumulative Unrealized Gain 761,012 [1] 625,752 [2]  
Estimated Fair Value 7,410,238 [1] 7,291,539 [2]  
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 6,426,485 [5] 6,449,455 [6]  
Cumulative Unrealized Gain 620,378 [5] 581,466 [6]  
Estimated Fair Value 7,046,863 [5] 7,030,921 [6]  
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 1,629,277 [1] 1,633,397 [2]  
Cumulative Unrealized Gain 173,217 [1] 140,681 [2]  
Estimated Fair Value 1,802,494 [1] 1,774,078 [2]  
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 [7],[8] 10,352,000    
Cumulative Unrealized Loss [7],[8] (30,868)    
Estimated Fair Value [7],[8] 10,321,132    
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 2,360,759 [3] 2,368,757 [4]  
Cumulative Unrealized Gain 221,592 [3] 199,617 [4]  
Estimated Fair Value 2,582,351 [3] 2,568,374 [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 7,491,273 [9] 7,507,111 [10]  
Cumulative Unrealized Gain 1,002,626 [9] 834,292 [10]  
Estimated Fair Value 8,493,899 [9] 8,341,403 [10]  
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 6,644,416 [9] 6,656,219 [10]  
Cumulative Unrealized Gain 1,106,804 [9] 902,690 [10]  
Estimated Fair Value 7,751,220 [9] 7,558,909 [10]  
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 11,090,000 [9],[11] 11,090,000 [10],[12]  
Cumulative Unrealized Loss (142,720) [9],[11] (331,311) [10],[12]  
Estimated Fair Value 10,947,280 [9],[11] 10,758,689 [10],[12]  
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 [9] 14,118,500    
Cumulative Unrealized Gain [9] 1,389,537    
Estimated Fair Value [9] 15,508,037    
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 [9] 4,000,000    
Cumulative Unrealized Gain [9] 430,868    
Estimated Fair Value [9] 4,430,868    
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur J -1 [Member] | CA [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 9,088,272 [9] 9,088,496 [10]  
Cumulative Unrealized Gain 174,524 [9] 122,815 [10]  
Estimated Fair Value 9,262,796 [9] 9,211,311 [10]  
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur J -2 [Member] | CA [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 7,500,000 [9] 7,500,000 [10]  
Cumulative Unrealized Gain 218,996 [9] 176,092 [10]  
Estimated Fair Value 7,718,996 [9] 7,676,092 [10]  
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur J -3 [Member] | CA [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 4,900,000 [9] 3,900,000 [10]  
Cumulative Unrealized Gain 696,071 [9] 726,834 [10]  
Estimated Fair Value 5,596,071 [9] 4,626,834 [10]  
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 29,565,978 [9] 26,067,585 [10]  
Estimated Fair Value 29,565,978 [9] 26,067,585 [10]  
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 3,359,484 [1] 3,367,978 [2]  
Cumulative Unrealized Gain 323,116 [1] 255,787 [2]  
Estimated Fair Value 3,682,600 [1] 3,623,765 [2]  
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 2,859,971 [3] 2,869,660 [4]  
Cumulative Unrealized Gain 243,572 [3] 216,000 [4]  
Estimated Fair Value 3,103,543 [3] 3,085,660 [4]  
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 4,124,186 [1] 4,137,438 [2]  
Cumulative Unrealized Gain 579,812 [1] 522,910 [2]  
Estimated Fair Value 4,703,998 [1] 4,660,348 [2]  
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 7,082,871 [1] 7,100,512 [2]  
Cumulative Unrealized Gain 810,644 [1] 666,562 [2]  
Estimated Fair Value 7,893,515 [1] 7,767,074 [2]  
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 11,925,242 [1] 11,954,944 [2]  
Cumulative Unrealized Gain 1,282,002 [1] 1,038,904 [2]  
Estimated Fair Value 13,207,244 [1] 12,993,848 [2]  
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 6,184,380 [1] 6,199,861 [2]  
Cumulative Unrealized Gain 271,726 [1] 265,296 [2]  
Estimated Fair Value 6,456,106 [1] 6,465,157 [2]  
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 3,417,200 [1] 3,428,986 [2]  
Cumulative Unrealized Gain 242,738 [1] 124,598 [2]  
Estimated Fair Value 3,659,938 [1] 3,553,584 [2]  
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 2,970,390 [1] 2,977,825 [2]  
Cumulative Unrealized Gain 307,465 [1] 247,354 [2]  
Estimated Fair Value 3,277,855 [1] 3,225,179 [2]  
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 5,595,802 [5] 5,616,043 [6]  
Cumulative Unrealized Gain 261,392 [5] 264,300 [6]  
Estimated Fair Value 5,857,194 [5] 5,880,343 [6]  
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 3,899,988 [9] 3,908,104 [10]  
Cumulative Unrealized Gain 607,120 [9] 514,719 [10]  
Estimated Fair Value 4,507,108 [9] 4,422,823 [10]  
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 3,656,848 [5] 3,670,075 [6]  
Cumulative Unrealized Gain 318,591 [5] 267,369 [6]  
Estimated Fair Value 3,975,439 [5] 3,937,444 [6]  
Mortgage Revenue Bonds Held In Trust [Member] | Brookstone [Member] | IL [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 7,272,720 [13] 7,286,052 [14]  
Cumulative Unrealized Gain 1,260,408 [13] 1,286,871 [14]  
Estimated Fair Value 8,533,128 [13] 8,572,923 [14]  
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 4,840,000 [5] 4,840,000 [6]  
Cumulative Unrealized Gain 96,546 [5] 117,014 [6]  
Estimated Fair Value 4,936,546 [5] 4,957,014 [6]  
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 10,547,250 [3] 10,585,375 [4]  
Cumulative Unrealized Gain 1,087,763 [3] 645,412 [4]  
Estimated Fair Value 11,635,013 [3] 11,230,787 [4]  
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 58,163,081 [9] 58,107,262 [10]  
Cumulative Unrealized Gain 2,955,764 [9] 2,217,857 [10]  
Estimated Fair Value 61,118,845 [9] 60,325,119 [10]  
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 6,900,000 [9] 6,900,000 [10]  
Estimated Fair Value 6,900,000 [9] 6,900,000 [10]  
Mortgage Revenue Bonds Held In Trust [Member] | Greens Property [Member] | Series A [Member] | NC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances [6]   7,599,000  
Cumulative Unrealized Gain [6]   597  
Estimated Fair Value [6]   7,599,597  
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 [15]   10,352,000  
Cumulative Unrealized Gain [15]   127,107  
Estimated Fair Value [15]   10,479,107  
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 7,538,527 [3] 7,557,312 [4]  
Cumulative Unrealized Gain 1,047,812 [3] 863,401 [4]  
Estimated Fair Value 8,586,339 [3] 8,420,713 [4]  
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 15,909,691 [16] 15,942,560 [17]  
Cumulative Unrealized Gain 2,173,819 [16] 1,727,010 [17]  
Estimated Fair Value 18,083,510 [16] 17,669,570 [17]  
Mortgage Revenue Bonds Held In Trust [Member] | Columbia Gardens [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 12,495,686 [1] 12,542,207 [2]  
Cumulative Unrealized Gain 1,034,559 [1] 968,469 [2]  
Estimated Fair Value 13,530,245 [1] 13,510,676 [2]  
Mortgage Revenue Bonds Held In Trust [Member] | Companion at Thornhill Apartments [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 10,750,304 [1] 10,786,181 [2]  
Cumulative Unrealized Gain 786,529 [1] 709,979 [2]  
Estimated Fair Value 11,536,833 [1] 11,496,160 [2]  
Mortgage Revenue Bonds Held In Trust [Member] | The Ivy Apartments [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances [9] 30,574,501    
Cumulative Unrealized Gain [9] 2,497,005    
Estimated Fair Value [9] 33,071,506    
Mortgage Revenue Bonds Held In Trust [Member] | The Palms at Premier Park Apartment [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 18,072,451 [5] 18,137,042 [6]  
Cumulative Unrealized Gain 781,887 [5] 808,555 [6]  
Estimated Fair Value 18,854,338 [5] 18,945,597 [6]  
Mortgage Revenue Bonds Held In Trust [Member] | The Park at Sondrio [Member] | Series 2022A [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 38,100,000 [9] 38,100,000 [10]  
Cumulative Unrealized Gain [9] 3,419,850    
Estimated Fair Value 41,519,850 [9] 38,100,000 [10]  
Mortgage Revenue Bonds Held In Trust [Member] | The Park at Vietti [Member] | Series 2022A [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 26,985,000 [9] 26,985,000 [10]  
Cumulative Unrealized Gain [9] 2,585,218    
Estimated Fair Value 29,570,218 [9] 26,985,000 [10]  
Mortgage Revenue Bonds Held In Trust [Member] | Village at River's Edge [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 9,629,238 [1] 9,649,659 [2]  
Cumulative Unrealized Gain 619,396 [1] 590,962 [2]  
Estimated Fair Value 10,248,634 [1] 10,240,621 [2]  
Mortgage Revenue Bonds Held In Trust [Member] | Willow Run [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 12,322,456 [1] 12,368,964 [2]  
Cumulative Unrealized Gain 1,019,204 [1] 953,988 [2]  
Estimated Fair Value 13,341,660 [1] 13,322,952 [2]  
Mortgage Revenue Bonds Held In Trust [Member] | Wiindsor Shores Apartments [Member] | Series A [Member] | Goose Creek, SC [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances [9] 21,545,000    
Cumulative Unrealized Gain [9] 1,947,217    
Estimated Fair Value [9] 23,492,217    
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 10,549,160 [5] 10,591,726 [6]  
Cumulative Unrealized Gain 2,100,532 [5] 2,005,029 [6]  
Estimated Fair Value 12,649,692 [5] 12,596,755 [6]  
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 13,494,899 [9] 13,532,636 [10]  
Cumulative Unrealized Gain 1,183,942 [9] 919,463 [10]  
Estimated Fair Value 14,678,841 [9] 14,452,099 [10]  
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 8,863,735 [5] 8,896,378 [6]  
Cumulative Unrealized Gain 1,120,331 [5] 975,504 [6]  
Estimated Fair Value 9,984,066 [5] 9,871,882 [6]  
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 7,171,072 [5] 7,196,674 [6]  
Cumulative Unrealized Gain 846,035 [5] 717,701 [6]  
Estimated Fair Value 8,017,107 [5] 7,914,375 [6]  
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 12,390,934 [3] 12,429,842 [4]  
Cumulative Unrealized Gain 1,023,277 [3] 950,930 [4]  
Estimated Fair Value 13,414,211 [3] 13,380,772 [4]  
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 5,114,293 [9] 5,128,595 [10]  
Cumulative Unrealized Gain 326,464 [9] 170,370 [10]  
Estimated Fair Value 5,440,757 [9] 5,298,965 [10]  
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 38,832,712 [9] 38,941,304 [10]  
Cumulative Unrealized Gain 3,198,610 [9] 2,645,832 [10]  
Estimated Fair Value 42,031,322 [9] 41,587,136 [10]  
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 6,191,941 [5] 6,214,048 [6]  
Cumulative Unrealized Gain 730,518 [5] 619,707 [6]  
Estimated Fair Value 6,922,459 [5] 6,833,755 [6]  
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 15,100,333 [5] 15,155,942 [6]  
Cumulative Unrealized Gain 1,542,244 [5] 1,290,551 [6]  
Estimated Fair Value 16,642,577 [5] 16,446,493 [6]  
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 4,909,476 [5] 4,927,003 [6]  
Cumulative Unrealized Gain 610,623 [5] 523,079 [6]  
Estimated Fair Value 5,520,099 [5] 5,450,082 [6]  
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 17,342,117 [1] 17,381,296 [2]  
Cumulative Unrealized Gain [2]   281,271  
Estimated Fair Value 17,342,117 [1] 17,662,567 [2]  
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 18,352,583 [1] 18,404,942 [2]  
Cumulative Unrealized Gain 2,049,948 [1] 1,842,303 [2]  
Estimated Fair Value 20,402,531 [1] 20,247,245 [2]  
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 12,856,852 [1] 12,893,533 [2]  
Cumulative Unrealized Gain 1,476,614 [1] 1,249,523 [2]  
Estimated Fair Value 14,333,466 [1] 14,143,056 [2]  
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 19,916,642 [1] 19,973,464 [2]  
Cumulative Unrealized Gain 2,287,433 [1] 1,935,645 [2]  
Estimated Fair Value 22,204,075 [1] 21,909,109 [2]  
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 7,149,233 [1] 7,170,756 [2]  
Cumulative Unrealized Gain 717,470 [1] 605,369 [2]  
Estimated Fair Value 7,866,703 [1] 7,776,125 [2]  
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 21,812,768 [1] 21,866,672 [2]  
Cumulative Unrealized Gain [2]   77,837  
Estimated Fair Value 21,812,768 [1] 21,944,509 [2]  
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 18,875,771 [1] 18,916,082 [2]  
Cumulative Unrealized Gain 2,614,493 [1] 2,209,462 [2]  
Estimated Fair Value 21,490,264 [1] 21,125,544 [2]  
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 6,545,246 [1] 6,564,951 [2]  
Cumulative Unrealized Gain 714,161 [1] 573,569 [2]  
Estimated Fair Value 7,259,407 [1] 7,138,520 [2]  
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 10,291,273 [3] 10,325,196 [4]  
Cumulative Unrealized Gain 762,083 [3] 671,790 [4]  
Estimated Fair Value 11,053,356 [3] 10,996,986 [4]  
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 11,881,878 [1] 11,911,472 [2]  
Cumulative Unrealized Gain 991,761 [1] 746,300 [2]  
Estimated Fair Value 12,873,639 [1] 12,657,772 [2]  
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 9,535,000 [13] 9,535,000 [14]  
Cumulative Unrealized Gain [14]   45,577  
Estimated Fair Value 9,535,000 [13] 9,580,577 [14]  
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 11,274,797 [13] 11,257,062 [14]  
Cumulative Unrealized Gain 1,271,619 [13] 1,352,726 [14]  
Estimated Fair Value 12,546,416 [13] 12,609,788 [14]  
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 9,434,170 [1] 9,454,318 [2]  
Cumulative Unrealized Gain 1,751,049 [1] 1,534,060 [2]  
Estimated Fair Value 11,185,219 [1] 10,988,378 [2]  
Mortgage Revenue Bonds [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 18,473,442 36,888,068  
Cumulative Unrealized Gain 1,605,344 504,076  
Cumulative Unrealized Loss (1,227,422) (1,193,085)  
Estimated Fair Value 18,851,364 36,199,059  
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 3,783,991 3,792,700  
Cumulative Unrealized Gain 173,162 42,672  
Estimated Fair Value 3,957,153 3,835,372  
Mortgage Revenue Bonds [Member] | Residency at Empire - Series BB-1 [Member] | CA [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances   14,118,500  
Estimated Fair Value   14,118,500  
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   4,000,000  
Estimated Fair Value   4,000,000  
Mortgage Revenue Bonds [Member] | Residency at Empire - Series BB-3 [Member] | CA [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 55,000 55,000  
Cumulative Unrealized Gain 815,481    
Estimated Fair Value 870,481 55,000  
Mortgage Revenue Bonds [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 1,000,000    
Estimated Fair Value 1,000,000    
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   915,039  
Cumulative Unrealized Gain   122  
Estimated Fair Value   915,161  
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 930,270 4,294,939  
Estimated Fair Value 930,270 4,294,939  
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 723,197 724,747  
Cumulative Unrealized Gain 64,509 53,132  
Estimated Fair Value 787,706 777,879  
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 529,739 530,829  
Cumulative Unrealized Gain 42,391 33,406  
Estimated Fair Value 572,130 564,235  
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 123,063 123,176  
Cumulative Unrealized Gain 23,296 22,510  
Estimated Fair Value 146,359 145,686  
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 436,987 437,886  
Cumulative Unrealized Gain 34,969 27,557  
Estimated Fair Value 471,956 465,443  
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 429,726 430,647  
Cumulative Unrealized Gain 33,619   $ 26,816
Estimated Fair Value 463,345 457,463  
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 2,626,469 2,631,168  
Cumulative Unrealized Gain 417,917 297,861  
Estimated Fair Value 3,044,386 2,929,029  
Mortgage Revenue Bonds [Member] | Meadow Valley [Member] | MI [Member]      
Schedule Of Available For Sale Securities [Line Items]      
Cost Adjusted for Paydowns and Allowances 7,835,000 [18] 4,833,437  
Cumulative Unrealized Loss (1,227,422) [18] (1,193,085)  
Estimated Fair Value $ (6,607,578) [18] $ 3,640,352  
[1] MRB owned by ATAX TEBS IV, LLC (M45 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[2] MRB owned by ATAX TEBS IV, LLC (M45 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[3] MRB owned by ATAX TEBS III, LLC (M33 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[4] MRB owned by ATAX TEBS III, LLC (M33 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[5] MRB owned by ATAX TEBS II, LLC (M31 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[6] MRB owned by ATAX TEBS II, LLC (M31 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[7] 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, 2023, the MRB has been in an unrealized loss position for less than 12 months.
[8] MRB held by Barclays Capital Inc. in a debt financing transaction, Note 16.
[9] MRB held by Mizuho Capital Markets, LLC in a debt financing transaction, Note 16.
[10] MRB held by Mizuho Capital Markets, LLC in a debt financing transaction, Note 16.
[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 March 31, 2023, the MRB has been in an unrealized loss position for more than 12 months.
[12] 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.
[13] MRB owned by ATAX TEBS I, LLC (M24 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[14] MRB owned by ATAX TEBS I, LLC (M24 TEBS), Note 16. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[15] MRB held by Barclays Capital Inc. in a debt financing transaction, Note 16.
[16] MRB held by Morgan Stanley in a debt financing transaction, Note 16.
[17] MRB held by Morgan Stanley in a debt financing transaction, Note 16.
[18] The Partnership has a remaining MRB funding commitment of $36.3 million as of March 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 $36.3 million funding commitment outstanding as of March 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 March 31, 2023, the MRB has been in an unrealized loss position for more than 12 months.