Goodwill and Other Intangible Assets - Summary of gross carrying amounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Other intangible assets
Gross carrying amount	$ 275,002		$ 275,002		$ 274,869
Accumulated amortization	(172,746)		(172,746)		(158,419)
Net carrying amount	102,256		102,256		116,450
Amortization expense	7,028	$ 8,847	14,327	$ 17,341
Fair value of SBA servicing assets	$ 6,200		$ 6,200		$ 6,100
Minimum
Other intangible assets
Estimated useful lives	2 years		2 years
Maximum
Other intangible assets
Estimated useful lives	15 years		15 years