Parent Company Income Statement (Details) - USD ($)		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Expenses
Income tax benefit		$ 55,046,000	$ 75,632,000	$ 83,941,000
Net Income		192,081,000	239,502,000	263,813,000
Parent Company [Member]
Income
Dividend Income, Operating	[1]	183,961,000	229,046,000	209,257,000
Total income		183,961,000	229,046,000	209,257,000
Expenses
Interest expense		5,014,000	6,829,000	4,626,000
Other Expenses		2,891,000	3,156,000	1,680,000
Total expenses		7,905,000	9,985,000	6,306,000
Income before income taxes and equity in undistributed income of subsidiaries		176,056,000	219,061,000	202,951,000
Income tax benefit		(2,280,000)	(2,785,000)	(1,731,000)
Income of parent company		178,336,000	221,846,000	204,682,000
Equity in undistributed income of subsidiaries		13,745,000	17,656,000	59,131,000
Net Income		$ 192,081,000	$ 239,502,000	$ 263,813,000

[1] Majority of balance eliminated in consolidation.