Fair Value Measurements - Schedule of Fair Value of Financial Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Total Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of year	$ 1,985,352	$ 1,115,855
Fair value, beginning of year	1,205,234	1,271,959
Proceeds from principal repayments and sales of investments	(541,036)	(393,912)
Accretion of discount/amortization of premium	8,822	9,635
Transfers into Level 3	0	0
Transfers out of Level 3	(22,334)	(2,257)
Fair value, end of year	2,627,580	1,985,352
Net change in unrealized appreciation (depreciation) related to financial instruments still held	(5,800)	(4,972)
Total Investments \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	321	(3,005)
Total Investments \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	(8,779)	(12,923)
First Lien Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of year	1,928,818	1,043,304
Fair value, beginning of year	1,057,215	1,240,344
Proceeds from principal repayments and sales of investments	(520,969)	(347,601)
Accretion of discount/amortization of premium	8,150	8,150
Transfers into Level 3	0	0
Transfers out of Level 3	(22,334)	0
Fair value, end of year	2,442,840	1,928,818
Net change in unrealized appreciation (depreciation) related to financial instruments still held	(5,766)	(5,107)
First Lien Debt \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	321	(3,132)
First Lien Debt \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	(8,361)	(12,247)
Second Lien Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of year	50,358	72,551
Fair value, beginning of year	96,015	25,434
Proceeds from principal repayments and sales of investments	(10,746)	(46,311)
Accretion of discount/amortization of premium	672	1,485
Transfers into Level 3	0	0
Transfers out of Level 3	0	(2,257)
Fair value, end of year	133,945	50,358
Net change in unrealized appreciation (depreciation) related to financial instruments still held	(1,970)	140
Second Lien Debt \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	0	127
Second Lien Debt \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	(2,354)	(671)
Preferred Equity
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of year	6,176	0
Fair value, beginning of year	44,686	6,181
Proceeds from principal repayments and sales of investments	(9,321)	0
Accretion of discount/amortization of premium	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value, end of year	43,101	6,176
Net change in unrealized appreciation (depreciation) related to financial instruments still held	1,560	(5)
Preferred Equity \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	0	0
Preferred Equity \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	1,560	(5)
Common Stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of year
Fair value, beginning of year	7,318
Proceeds from principal repayments and sales of investments	0
Accretion of discount/amortization of premium	0
Transfers into Level 3	0
Transfers out of Level 3	0
Fair value, end of year	7,694
Net change in unrealized appreciation (depreciation) related to financial instruments still held	376
Common Stocks \| Net realized gain (loss)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	0
Common Stocks \| Net change in unrealized appreciation (depreciation)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net gains (losses) included in earnings	$ 376

T. Rowe Price OHA Select Private Credit Fund 10-K