Other Intangible Assets and Goodwill - Net Carrying Value of Core Deposit Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Core Deposit Intangibles and Aggregate Amortization Expense
Net carrying value	$ 31,870	$ 41,601
Aggregate amortization expense	9,731	10,658	$ 10,271
Core Deposits Intangibles
Net Core Deposit Intangibles and Aggregate Amortization Expense
Gross carrying value	95,120	95,120	95,120
Accumulated amortization	(63,250)	(53,519)	(42,861)
Net carrying value	31,870	41,601	52,259
Aggregate amortization expense	9,731	$ 10,658	$ 10,271
Estimated Amortization Expense
2024	8,815
2025	7,611
2026	6,561
2027	5,603
2028	$ 2,168