Goodwill and Other Intangible Assets - Summary of gross carrying amounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Other intangible assets
Gross carrying amount	$ 275,108		$ 275,108		$ 274,753
Accumulated amortization	(197,719)		(197,719)		(185,977)
Net carrying amount	77,389		77,389		88,776
Amortization expense	5,744	$ 7,028	11,742	$ 14,327
Fair value of SBA servicing assets	$ 6,300		$ 6,300		$ 6,000
Minimum
Other intangible assets
Estimated useful lives	2 years		2 years
Maximum
Other intangible assets
Estimated useful lives	15 years		15 years