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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Related Party Transaction [Line Items]
Selling, general and administrative expenses	$ 149,709	$ 143,883
Related Party
Related Party Transaction [Line Items]
Selling, general and administrative expenses	$ 200	$ 200
Distribution Solutions Group | LKCM Headwater Operations, LLC | Significant Shareholder
Related Party Transaction [Line Items]
Shares owned by related party (in shares)	36,400,000
Noncontrolling ownership (as a percent)	78.70%

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