Schedule II - Condensed Financial Information of the Registrant Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Statements of Income and Comprehensive Income
Revenues	$ 797,559	$ 884,911	$ 846,248
Expenses	737,978	720,641	671,478
Net income	46,561	130,710	138,211
Other comprehensive (loss) income, net of tax	(105,117)	(28,948)	25,337
Comprehensive (loss) income	(58,556)	101,762	163,548
Registrant
Condensed Statements of Income and Comprehensive Income
Expenses	3,255	1,755	1,833
Net loss	(3,255)	(1,755)	(1,833)
Earnings from consolidated subsidiaries	49,816	132,465	140,044
Net income	46,561	130,710	138,211
Other comprehensive (loss) income, net of tax	(105,117)	(28,948)	25,337
Comprehensive (loss) income	$ (58,556)	$ 101,762	$ 163,548