Income taxes - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Deferred compensation	$ 37,320	$ 35,846
Deferred rent and lease incentives	8,805	7,504
Net operating losses and credits	17,130	13,822
Receivables reserves	679	925
Accrued expenses	297	1,284
Involuntary conversion	1,693	1,696
Other	980	1,028
Total deferred tax assets	66,904	62,105
Valuation allowance	(14,335)	(11,516)
Deferred tax assets after valuation allowance	52,569	50,589
Deferred tax liabilities:
Goodwill	41,569	41,560
Partnership investments	31,390	28,967
Company-owned life insurance	19,450	16,619
Depreciation	4,238	3,151
Other	342	198
Total deferred tax liabilities	96,989	90,495
Total deferred tax liabilities	$ (44,420)	$ (39,906)