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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2022	Mar. 31, 2020	Sep. 30, 2018	Sep. 30, 2024	Sep. 30, 2023
Cash Transactions:
Interest paid						$ 1,018,706	$ 714,827
Income Taxes Paid						30,047	96,698
Operating lease payments						28,444	22,648
Noncash Transactions:
Loans charged-off to the allowance for credit losses	$ 23,139	$ 24,709				72,773	57,616
Loans foreclosed upon and transferred to other real estate owned						435	435
Loans Foreclosed Upon Transferred To Other Assets						197	561
Available-for-sale securities transferred to held-to-maturity portfolio			$ 1,100,000	$ 873,600	$ 179,800
Right of use assets recognized during the period in exchange for lease obligations						$ 24,064	$ 195,995

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