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Shareholders' Equity (Detail) - USD ($)	3 Months Ended
Shareholders' Equity (Detail) - USD ($)	Mar. 31, 2025	Mar. 31, 2024	Feb. 25, 2021
Class of Stock [Line Items]
Cash dividends received	$ 12,000,000.0	$ 20,400,000
Market value of shares repurchased under equity compensation plans	$ (439,000)	$ 0
Equity Compensation Plans
Class of Stock [Line Items]
Stock options exercised (in shares)	0	0
Other Share Based Awards \| Equity Compensation Plans
Class of Stock [Line Items]
Company's common stock in lieu of cash to exercise options to purchase shares (in shares)	10,122	0
Common Stock \| Equity Compensation Plans
Class of Stock [Line Items]
Market value of shares repurchased under equity compensation plans	$ 400,000	$ 0
2021 Stock Repurchase Plan
Class of Stock [Line Items]
Repurchase of common stock (in shares)			2,000,000.0
Stock repurchase program, percentage of common stock			6.70%
Repurchase of common stock (in shares)	89,654	99,332
Repurchase of common stock	$ 3,700,000	$ 3,400,000