Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax [Line Items]
Pretax income	$ 216,836	$ 201,440	$ 192,121
Effective income tax rate	26.30%	26.70%	23.10%
Favorable discrete adjustment			$ 4,500
Effective tax rate impact associated with subsidiary worthless stock			2.40%
Deferred tax assets, capital loss	$ 907
Effective tax rate impact associated with stock-based compensation	1.00%	1.30%	1.10%
Unrecognized tax benefits that would impact effective tax rate	$ 30,200	$ 27,400
Short-term reserves	2,100
Long-term reserves	30,400
Interest and penalties	5,600	4,400
Deferred tax asset, gross	357,800	373,000
Deferred tax liability, gross	103,400	79,100
Tax amortization	22,836	33,148
Federal Tax Authority [Member] | Acquired Businesses [Member]
Income Tax [Line Items]
Net operating loss carry forwards	17,900
Interest expense disallowance carryforward	18,100
Deferred tax amortizable intangible assets	189,800
State [Member]
Income Tax [Line Items]
Deferred tax assets, valuation allowance	11,500	12,000
Capital loss upon sale of equity investment		3,800
Net operating loss carry forwards	212,400
State [Member] | Acquired Businesses [Member]
Income Tax [Line Items]
Net operating loss carry forwards	8,300
Combined State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	127,200
Separate State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	52,000
Maximum [Member]
Income Tax [Line Items]
Unrecognized tax benefit, income tax penalties and interest benefit (expense) recognized	$ 1,000	$ 1,000	$ 700
Maximum [Member] | State [Member]
Income Tax [Line Items]
Net operating loss carry forwards, expiration year	2037
Minimum [Member] | State [Member]
Income Tax [Line Items]
Net operating loss carry forwards, expiration year	2025