Other Intangible Assets and Goodwill - Net Carrying Value of Core Deposit Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Core Deposit Intangibles and Aggregate Amortization Expense
Net carrying value	$ 41,601	$ 52,259
Aggregate amortization expense	10,658	10,271	$ 10,370
Core Deposits Intangibles
Net Core Deposit Intangibles and Aggregate Amortization Expense
Gross carrying value	95,120	95,120	88,099
Accumulated amortization	(53,519)	(42,861)	(32,590)
Net carrying value	41,601	52,259	55,509
Aggregate amortization expense	10,658	$ 10,271	$ 10,370
Estimated Amortization Expense
2023	9,731
2024	8,815
2025	7,611
2026	6,561
2027	$ 5,603

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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