Schedule II. Condensed Financial Information of Registrant - Notes To Condensed Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Condensed Financial Statements, Captions [Line Items]
Stock-based compensation not involving cash	$ 53,355	$ 40,118	$ 30,736
Interest paid	144,680	116,993	99,545
Income taxes paid (received)	$ 140,926	$ 128,395	121,034
Preferred stock, shares outstanding (in shares)	0	0
Parent Company
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiaries	$ 815,741	$ 692,690	459,535
Stock-based compensation not involving cash	53,355	40,118	30,736
Investment in subsidiaries	640,065	0	0
Dividends from subsidiaries	640,065	0	0
Interest paid	150,019	114,459	104,493
Income taxes paid (received)	$ (21,033)	$ (13,126)	$ (10,408)
Preferred stock, liquidation distribution available to stockholders, per share in thousands (in dollars per share)	$ 1,000
Preferred stock, liquidating distribution legally available, aggregate value	$ 351,000
Parent Company | Cumulative Series A Preferred Stock
Condensed Financial Statements, Captions [Line Items]
Preferred stock, shares issued (in shares)	351,000
Preferred stock, shares outstanding (in shares)	351,000
Parent Company | 6.50% Cumulative Preferred Stock, Series A
Condensed Financial Statements, Captions [Line Items]
Preferred stock, shares issued (in shares)	280,000
Preferred stock, shares outstanding (in shares)	280,000
Preferred stock, dividend rate, percentage	6.50%
Parent Company | 7.15% Cumulative Preferred Stock, Series A
Condensed Financial Statements, Captions [Line Items]
Preferred stock, shares issued (in shares)	71,000
Preferred stock, shares outstanding (in shares)	71,000
Preferred stock, dividend rate, percentage	7.15%