Goodwill and Other Acquisition-Related Intangible Assets - Schedule of Amortization of Finite-Lived Acquisition-Related Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Intangibles with finite lives
Accumulated amortization	$ (84,423)	$ (78,805)	$ (67,868)
Intangibles with indefinite lives
Gross carrying amount	200,495	200,495	89,598
Total other acquisition-related intangible assets, net	116,072	121,690	21,730
Community banking
Intangibles with indefinite lives
Total other acquisition-related intangible assets, net	109,862	115,122	14,107
Community banking | Trademark
Intangibles with indefinite lives
Carrying amount	13,800	13,800	5,800
Community banking | Core deposit intangibles
Intangibles with finite lives
Gross carrying amount	158,106	158,106	55,206
Accumulated amortization	(62,044)	(56,784)	(46,899)
Net carrying amount	96,062	101,322	8,307
Specialty finance | Customer list intangibles
Intangibles with finite lives
Gross carrying amount	1,959	1,959	1,962
Accumulated amortization	(1,901)	(1,881)	(1,849)
Net carrying amount	58	78	113
Wealth management | Customer list and other intangibles
Intangibles with finite lives
Gross carrying amount	26,630	26,630	26,630
Accumulated amortization	(20,478)	(20,140)	(19,120)
Net carrying amount	$ 6,152	$ 6,490	$ 7,510