Net Assets
 3 Months Ended
Mar. 31, 2023
Equity [Abstract]  
Net Assets Net Assets
The table below illustrates the effect of certain transactions on the net asset accounts of the Company during the three months ended March 31, 2023:
Accumulated Overdistributed Earnings
 Common StockPaid in
Capital in
Excess		Accumulated
Net Investment		Accumulated Net Realized Net 
Unrealized Appreciation		Total Net AssetsNon-
Controlling
Interest in		Total
 SharesPar Amountof ParIncome(Losses) Gains(Depreciation)of NMFCNMNLCNet Assets
Net assets at December 31, 2022100,937,026 $1,009 $1,305,945 $147,593 $(68,072)$(72,002)$1,314,473 $11,718 $1,326,191 
Issuances of common stock— — — — — — — — — 
Offering costs— — (56)— — — (56)— (56)
Distributions declared — — — (32,300)— — (32,300)(153)(32,453)
Net increase in net assets resulting from operations— — — 38,113 677 5,783 44,573 239 44,812 
Net assets at March 31, 2023100,937,026 $1,009 $1,305,889 $153,406 $(67,395)$(66,219)$1,326,690 $11,804 $1,338,494 
    The table below illustrates the effect of certain transactions on the net asset accounts of the Company during the three months ended March 31, 2022:
Accumulated Undistributed (Overdistributed) Earnings
 Common StockPaid in
Capital in Excess		Accumulated
Net Investment		Accumulated Net Realized 
(Losses)		Net 
Unrealized Appreciation		Total Net AssetsNon-Controlling Interest inTotal
 SharesPar Amountof ParIncomeGains(Depreciation)of NMFCNMNLCNet Assets
Net assets at December 31, 202197,907,441 $979 $1,272,796 $118,330 $(92,099)$21,239 $1,321,245 $21,367 $1,342,612 
Issuances of common stock1,591,121 16 21,556 — — — 21,572 — 21,572 
Offering costs— — (52)— — — (52)— (52)
Distributions declared— — — (29,589)— — (29,589)(3,750)(33,339)
Net increase (decrease) in net assets resulting from operations— — — 29,573 17,596 (10,977)36,192 855 37,047 
Net assets at March 31, 202299,498,562 $995 $1,294,300 $118,314 $(74,503)$10,262 $1,349,368 $18,472 $1,367,840 
On November 3, 2021, the Company entered into an equity distribution agreement (the “Distribution Agreement”) with B. Riley Securities, Inc. and Raymond James & Associates, Inc. (collectively, the “Agents”). The Distribution Agreement provides that the Company may issue and sell its shares from time to time through the Agents, up to $250,000 worth of its common stock by means of at-the-market ("ATM") offerings.
For the three months ended March 31, 2023, the Company did not sell any shares of common stock under the Distribution Agreement. For the three months ended March 31, 2022, the Company sold 1,511,836 shares of common stock under the Distribution Agreement. For the three months ended March 31, 2022, the Company received total accumulated net proceeds of approximately $20,474, including $295 of offering expenses, from these sales.
The Company generally uses net proceeds from these ATM offerings to make investments, to pay down liabilities and for general corporate purposes. As of March 31, 2023, shares representing approximately $196,938 of its common stock remain available for issuance and sale under the Distribution Agreement.