Portfolio Investments - Mortgages Outstanding for NPRC (Details) - NPRC $ in Thousands	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Purchase Price	$ 2,672,726
Mortgage Outstanding	2,226,850
Filet of Chicken
Debt Instrument [Line Items]
Purchase Price	7,400
Mortgage Outstanding	0
Arlington Park Marietta, LLC
Debt Instrument [Line Items]
Purchase Price	14,850
Mortgage Outstanding	13,494
Taco Bell, OK
Debt Instrument [Line Items]
Purchase Price	1,719
Mortgage Outstanding	0
Taco Bell, Mo
Debt Instrument [Line Items]
Purchase Price	1,405
Mortgage Outstanding	0
Abbie Lakes OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	12,600
Mortgage Outstanding	14,947
Kengary Way OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	11,500
Mortgage Outstanding	15,111
Lakeview Trail OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	26,500
Mortgage Outstanding	28,827
Lakepoint OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	11,000
Mortgage Outstanding	16,405
Sunbury OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	13,000
Mortgage Outstanding	16,635
Heatherbridge OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	18,416
Mortgage Outstanding	23,771
Jefferson Chase OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	13,551
Mortgage Outstanding	18,511
Goldenstrand OH Partners, LLC
Debt Instrument [Line Items]
Purchase Price	7,810
Mortgage Outstanding	11,282
SSIL I, LLC
Debt Instrument [Line Items]
Purchase Price	34,500
Mortgage Outstanding	25,149
Vesper Tuscaloosa, LLC
Debt Instrument [Line Items]
Purchase Price	54,500
Mortgage Outstanding	42,220
Vesper Iowa City, LLC
Debt Instrument [Line Items]
Purchase Price	32,750
Mortgage Outstanding	24,348
Vesper Corpus Christi, LLC
Debt Instrument [Line Items]
Purchase Price	14,250
Mortgage Outstanding	10,593
Vesper Campus Quarters, LLC
Debt Instrument [Line Items]
Purchase Price	18,350
Mortgage Outstanding	13,903
Vesper College Station, LLC
Debt Instrument [Line Items]
Purchase Price	41,500
Mortgage Outstanding	31,442
Vesper Kennesaw, LLC
Debt Instrument [Line Items]
Purchase Price	57,900
Mortgage Outstanding	50,076
Vesper Statesboro, LLC
Debt Instrument [Line Items]
Purchase Price	7,500
Mortgage Outstanding	7,480
Vesper Manhattan KS, LLC
Debt Instrument [Line Items]
Purchase Price	23,250
Mortgage Outstanding	14,679
9220 Old Lantern Way, LLC
Debt Instrument [Line Items]
Purchase Price	187,250
Mortgage Outstanding	153,580
7915 Baymeadows Circle Owner, LLC
Debt Instrument [Line Items]
Purchase Price	95,700
Mortgage Outstanding	90,649
8025 Baymeadows Circle Owner, LLC
Debt Instrument [Line Items]
Purchase Price	15,300
Mortgage Outstanding	15,764
23275 Riverside Drive Owner, LLC
Debt Instrument [Line Items]
Purchase Price	52,000
Mortgage Outstanding	54,458
23741 Pond Road Owner, LLC
Debt Instrument [Line Items]
Purchase Price	16,500
Mortgage Outstanding	18,874
150 Steeplechase Way Owner, LLC
Debt Instrument [Line Items]
Purchase Price	44,500
Mortgage Outstanding	36,668
Olentangy Commons Owner LLC
Debt Instrument [Line Items]
Purchase Price	113,000
Mortgage Outstanding	92,876
Villages of Wildwood Holdings LLC
Debt Instrument [Line Items]
Purchase Price	46,500
Mortgage Outstanding	58,393
Falling Creek Holdings LLC
Debt Instrument [Line Items]
Purchase Price	25,000
Mortgage Outstanding	25,374
Crown Pointe Passthrough LLC
Debt Instrument [Line Items]
Purchase Price	108,500
Mortgage Outstanding	89,400
Lorring Owner LLC
Debt Instrument [Line Items]
Purchase Price	58,521
Mortgage Outstanding	47,680
Hamptons Apartments Owner, LLC
Debt Instrument [Line Items]
Purchase Price	96,500
Mortgage Outstanding	79,520
5224 Long Road Holdings, LLC
Debt Instrument [Line Items]
Purchase Price	26,500
Mortgage Outstanding	21,200
Druid Hills Holdings LLC
Debt Instrument [Line Items]
Purchase Price	96,000
Mortgage Outstanding	79,104
Bel Canto NPRC Parcstone LLC
Debt Instrument [Line Items]
Purchase Price	45,000
Mortgage Outstanding	42,793
Bel Canto NPRC Stone Ridge LLC
Debt Instrument [Line Items]
Purchase Price	21,900
Mortgage Outstanding	21,545
Sterling Place Holdings LLC
Debt Instrument [Line Items]
Purchase Price	41,500
Mortgage Outstanding	34,196
SPCP Hampton LLC
Debt Instrument [Line Items]
Purchase Price	36,000
Mortgage Outstanding	27,590
Palmetto Creek Holdings LLC
Debt Instrument [Line Items]
Purchase Price	33,182
Mortgage Outstanding	25,865
Valora at Homewood Holdings LLC
Debt Instrument [Line Items]
Purchase Price	81,250
Mortgage Outstanding	63,844
NPRC Fairburn LLC
Debt Instrument [Line Items]
Purchase Price	52,140
Mortgage Outstanding	43,900
NPRC Grayson LLC
Debt Instrument [Line Items]
Purchase Price	47,860
Mortgage Outstanding	40,500
NPRC Taylors LLC
Debt Instrument [Line Items]
Purchase Price	18,762
Mortgage Outstanding	14,075
Parkside at Laurel West Owner LLC
Debt Instrument [Line Items]
Purchase Price	57,005
Mortgage Outstanding	42,025
Willows at North End Owner LLC
Debt Instrument [Line Items]
Purchase Price	23,255
Mortgage Outstanding	19,000
SPCP Edge CL Owner LLC
Debt Instrument [Line Items]
Purchase Price	34,000
Mortgage Outstanding	25,496
Jackson Pear Orchard LLC
Debt Instrument [Line Items]
Purchase Price	50,900
Mortgage Outstanding	42,975
Jackson Lakeshore Landing LLC
Debt Instrument [Line Items]
Purchase Price	22,600
Mortgage Outstanding	17,955
Jackson Reflection Pointe LLC
Debt Instrument [Line Items]
Purchase Price	45,100
Mortgage Outstanding	33,203
Jackson Crosswinds LLC
Debt Instrument [Line Items]
Purchase Price	41,400
Mortgage Outstanding	38,601
Elliot Apartments Norcross, LLC
Debt Instrument [Line Items]
Purchase Price	128,000
Mortgage Outstanding	101,124
Orlando 442 Owner, LLC (West Vue Apartments)
Debt Instrument [Line Items]
Purchase Price	97,500
Mortgage Outstanding	73,000
NPRC Wolfchase LLC
Debt Instrument [Line Items]
Purchase Price	82,100
Mortgage Outstanding	60,000
NPRC Twin Oaks LLC
Debt Instrument [Line Items]
Purchase Price	44,850
Mortgage Outstanding	33,960
NPRC Lancaster LLC
Debt Instrument [Line Items]
Purchase Price	37,550
Mortgage Outstanding	28,536
NPRC Rutland LLC
Debt Instrument [Line Items]
Purchase Price	29,750
Mortgage Outstanding	22,710
Southport Owner LLC (Southport Crossing)
Debt Instrument [Line Items]
Purchase Price	48,100
Mortgage Outstanding	36,075
TP Cheyenne, LLC
Debt Instrument [Line Items]
Purchase Price	27,500
Mortgage Outstanding	17,656
TP Pueblo, LLC
Debt Instrument [Line Items]
Purchase Price	31,500
Mortgage Outstanding	20,166
TP Stillwater, LLC
Debt Instrument [Line Items]
Purchase Price	26,100
Mortgage Outstanding	15,328
TP Kokomo, LLC
Debt Instrument [Line Items]
Purchase Price	20,500
Mortgage Outstanding	12,753
Terraces at Perkins Rowe JV LLC
Debt Instrument [Line Items]
Purchase Price	41,400
Mortgage Outstanding	$ 29,566