Goodwill and Other Intangible Assets - Summary of gross carrying amounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Other intangible assets
Gross carrying amount	$ 275,321		$ 274,869
Accumulated amortization	(165,718)		(158,419)
Net carrying amount	109,603		116,450
Amortization expense	7,299	$ 8,494
Fair value of SBA servicing assets	$ 6,500		$ 6,100
Minimum
Other intangible assets
Estimated useful lives	2 years
Maximum
Other intangible assets
Estimated useful lives	15 years