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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Related Party Transaction [Line Items]
Selling, general and administrative expenses	$ 152,268	$ 143,258	$ 301,977	$ 287,141
Related Party
Related Party Transaction [Line Items]
Selling, general and administrative expenses	$ 100	$ 400	$ 300	$ 600
Distribution Solutions Group | LKCM Headwater Operations, LLC | Significant Shareholder
Related Party Transaction [Line Items]
Shares owned by related party (in shares)	36,400,000		36,400,000
Noncontrolling ownership (as a percent)	78.60%		78.60%

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