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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% |  |

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