Equity - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) shares	Jun. 30, 2026 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) shares	Dec. 31, 2025 shares	May 31, 2025 USD ($)
Class of Stock [Line Items]
Preferred stock, issued (in shares)	0		0		0
2025 Stock Repurchase Plan
Class of Stock [Line Items]
Share repurchase program, authorized (in shares) | $						$ 50.0
Stock repurchased during period, (in shares)		0		0
Share repurchase program, remaining authorized, amount | $	$ 40.0		$ 40.0
Smith Douglas Holdings LLC
Class of Stock [Line Items]
Percentage of economic interest	17.70%		17.70%
Percentage of non-controlling interest	82.30%		82.30%		82.50%
Tax distributions | $	$ 1.9	$ 9.5	$ 8.9	$ 23.3
Class A Common Stock
Class of Stock [Line Items]
Stock exchange ratio			1
Common stock, outstanding (in shares)	8,386,996		8,386,996		9,017,708
Class A Common Stock | 2025 Stock Repurchase Plan
Class of Stock [Line Items]
Stock repurchased during period, (in shares)	312,351		761,955
Stock repurchased during period, value | $	$ 4.4		$ 10.1
Shares acquired, average cost per share (in dollars per share) | $ / shares	$ 14.13		$ 13.28
Class A Common Stock | Smith Douglas Holdings LLC
Class of Stock [Line Items]
Common stock, outstanding (in shares)	9,109,212		9,109,212
Class B Common Stock
Class of Stock [Line Items]
Stock exchange ratio			1
Common stock, outstanding (in shares)	42,435,897		42,435,897		42,435,897
Class B Common Stock | Smith Douglas Holdings LLC
Class of Stock [Line Items]
Common stock, outstanding (in shares)	42,435,897		42,435,897