Hercules Capital, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Distributions - Schedule of Dividends Declared (Details)

Stockholders' Equity and Distributions - Schedule of Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Thousands						3 Months Ended		12 Months Ended
	Mar. 06, 2024	Nov. 22, 2023	Aug. 25, 2023	May 23, 2023	Mar. 09, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Dividends Payable [Line Items]
Per share amount (in dollars per share)						$ 0.48	$ 0.47	$ 1.90
Total Amount						$ 76,031	$ 64,774	$ 278,301
Dividend Declared One
Dividends Payable [Line Items]
Distribution Type						Base		Base
Declared Date						Feb. 08, 2024		Feb. 09, 2023
Record Date						Feb. 28, 2024		Mar. 02, 2023
Payment Date						Mar. 06, 2024		Mar. 09, 2023
Per share amount (in dollars per share)	$ 0.40				$ 0.39
Total Amount	$ 63,359				$ 53,749
Dividend Declared Two
Dividends Payable [Line Items]
Distribution Type						Supplemental		Supplemental
Declared Date						Feb. 08, 2024		Feb. 09, 2023
Record Date						Feb. 28, 2024		Mar. 02, 2023
Payment Date						Mar. 06, 2024		Mar. 09, 2023
Per share amount (in dollars per share)	$ 0.08				$ 0.08
Total Amount	$ 12,672				$ 11,025
Dividend Declared Three
Dividends Payable [Line Items]
Distribution Type								Base
Declared Date								Apr. 27, 2023
Record Date								May 16, 2023
Payment Date								May 23, 2023
Per share amount (in dollars per share)				$ 0.39
Total Amount				$ 55,910
Dividend Declared Four
Dividends Payable [Line Items]
Distribution Type								Supplemental
Declared Date								Apr. 27, 2023
Record Date								May 16, 2023
Payment Date								May 23, 2023
Per share amount (in dollars per share)				$ 0.08
Total Amount				$ 11,469
Dividend Declared Five
Dividends Payable [Line Items]
Distribution Type								Base
Declared Date								Jul. 28, 2023
Record Date								Aug. 18, 2023
Payment Date								Aug. 25, 2023
Per share amount (in dollars per share)			$ 0.40
Total Amount			$ 60,445
Dividend Declared Six
Dividends Payable [Line Items]
Distribution Type								Supplemental
Declared Date								Jul. 28, 2023
Record Date								Aug. 18, 2023
Payment Date								Aug. 25, 2023
Per share amount (in dollars per share)			$ 0.08
Total Amount			$ 12,089
Dividend Declared Seven
Dividends Payable [Line Items]
Distribution Type								Base
Declared Date								Oct. 26, 2023
Record Date								Nov. 15, 2023
Payment Date								Nov. 22, 2023
Per share amount (in dollars per share)		$ 0.40
Total Amount		$ 61,345
Dividend Declared Eight
Dividends Payable [Line Items]
Distribution Type								Supplemental
Declared Date								Oct. 26, 2023
Record Date								Nov. 15, 2023
Payment Date								Nov. 22, 2023
Per share amount (in dollars per share)		$ 0.08
Total Amount		$ 12,269