Business Combinations - Transaction Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Business Combination, Separately Recognized Transaction [Line Items]
Labor and Related Expense	$ 161,168	$ 126,994	$ 296,341	$ 250,890
Information Technology and Data Processing	32,867	26,508	62,603	53,646
Occupancy, Net	14,091	12,644	27,817	28,025
Marketing and Advertising Expense	8,548	7,748	16,374	14,134
Equipment Expense	5,423	4,494	11,033	9,021
Professional Fees	17,454	6,674	24,176	12,757
Other Noninterest Expense	13,290	$ 9,674	20,914	$ 21,648
American National [Member]
Business Combination, Separately Recognized Transaction [Line Items]
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed			25,500
American National [Member] | Other Expense [Member]
Business Combination, Separately Recognized Transaction [Line Items]
Labor and Related Expense	13,364		13,364
Information Technology and Data Processing	781		781
Occupancy, Net	23		103
Marketing and Advertising Expense	417		654
Equipment Expense	98		98
Professional Fees	9,569		10,253
Other Noninterest Expense	217		223
Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed	$ 24,469		$ 25,476