Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2022
Income Tax [Line Items]
Pretax income	$ 134,269	$ 149,067	$ 146,740
Favorable adjustment related to federal and state credits claimed		500
Recognition of an excess tax benefit and deficiency	800	$ 1,600	400
Effective tax rate favorable adjustment related to federal and state credits claimed		0.30%
Favorable adjustment associated with a capital loss		$ 3,100
Effective income tax rate reconciliation favorable adjustment related to capital loss incurred for tax purpose		2.10%
Deferred tax assets, valuation allowance	$ 2,100
Increase in effective rate due to unfavorable adjustment associated with tax effect of stock-based compensation	0.60%
Effective tax rate reflects to establishment of full valuation allowance with combined state net operating losses	$ 1,400
Expected non-deductibility of reductions in carrying value of equity investment	$ 900
Increased in effective rate due to establishment full valuation allowance and non-deductibility of reductions	1.70%
Favorable adjustment related to release of valuation allowance			$ 16,000
Effective income tax rate reconciliation, tax settlement, foreign, percent			10.90%
Effective tax rate impact associated with stock-based compensation	0.60%	1.00%	(0.30%)
Unrecognized tax benefits that would impact effective tax rate	$ 22,200	$ 14,200
Short-term reserves	5,700
Long-term reserves	19,000
Interest and penalties	$ 2,500	2,000
Significant change in unrecognized tax benefits, nature of event description	Due to the expiration of various statutes of limitations
Gross unrecognized tax benefits change range, minimum	$ 0
Gross unrecognized tax benefits change range, maximum	6,300
Deferred tax asset, gross	166,100	179,200
Deferred tax liability, gross	42,100	44,700
Foreign tax credits	7,200
Valuation allowance against portion of the foreign tax credit carryforward not supported by ODL	9,700
Net deferred income tax assets		32,200		$ 32,200
Deferred tax assets valuation allowance related to foreign tax credits equity investment available for sale investment short term investment and state net operating loss	22,500
Valuation allowance related to reductions in carrying value of equity investment	881
Valuation allowance attributable to the unrealized holding loss on available for sale short-term investments	1,267
Deferred Tax Assets, Net	3,100
Federal Tax Authority [Member] | Coding Dojo [Member]
Income Tax [Line Items]
Net operating loss carry forwards	$ 200	5,800
Foreign Country [Member]
Income Tax [Line Items]
Foreign tax credits, expiration year	2023
State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	$ 291,800
Increase in valuation allowance against State NOL	1,000
State [Member] | Coding Dojo [Member]
Income Tax [Line Items]
Net operating loss carry forwards	100	3,400
Combined State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	135,800
Separate State [Member]
Income Tax [Line Items]
Net operating loss carry forwards	81,500
Maximum [Member]
Income Tax [Line Items]
Unrecognized tax benefit, income tax penalties and interest benefit (expense) recognized	$ 400	100	$ 100
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	2023
Capital Loss Carryforward
Income Tax [Line Items]
Deferred tax assets, valuation allowance	$ 3,100	$ 3,100
Effective income tax rate reconciliation, tax settlement, percent	2.30%	2.10%