New Authoritative Accounting Guidance (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses decrease	$ 442,175	$ 436,432		$ 458,655	$ 475,744	$ 468,819		$ 359,202
Adjustment due to adoption of ASUs	6,627,299	6,575,184	$ 6,511,581	6,400,802	6,273,829	6,204,913	$ 5,096,384	5,084,066
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment due to adoption of ASUs	$ 1,460,284	$ 1,379,534	$ 1,300,980	1,218,445	$ 1,100,838	$ 982,146	$ 945,225	$ 883,645
Revision of Prior Period, Accounting Standards Update, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses decrease				(1,400)
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses decrease				(1,368)
Adjustment due to adoption of ASUs				990
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment due to adoption of ASUs				$ 990