Allowance for Credit Losses (ACL) - Disaggregated analysis of the changes in allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Allowance for credit losses
Balance at beginning of period	$ 472,298	$ 427,392	$ 456,573	$ 356,444	$ 356,444
Charge-offs	(8,603)	(17,970)	(25,133)	(30,175)	(40,648)
Recoveries	2,523	4,773	12,149	12,630
Net (charge-offs) recoveries	(6,080)	(13,197)	(12,984)	(17,545)
Provision (recovery)	1,763	33,761	24,392	109,057
Balance at end of period	467,981	447,956	467,981	447,956	456,573
Unfunded Commitment
Allowance for credit losses
Provision (recovery)	(8,700)	(1,100)	(14,800)	(4,900)
Residential Mortgage Sr.
Allowance for credit losses
Balance at beginning of period	59,552	81,469	78,052	72,188	72,188
Charge-offs	(169)	(57)	(548)	(96)
Recoveries	37	240	252	836
Net (charge-offs) recoveries	(132)	183	(296)	740
Provision (recovery)	(6,725)	(4,601)	(25,061)	4,123
Balance at end of period	52,695	77,051	52,695	77,051	78,052
Residential Mortgage Jr.
Allowance for credit losses
Balance at beginning of period	428	392	745	405	405
Recoveries	8	28	97	36
Net (charge-offs) recoveries	8	28	97	36
Provision (recovery)	65	74	(341)	53
Balance at end of period	501	494	501	494	745
HELOC
Allowance for credit losses
Balance at beginning of period	18,929	14,212	10,942	14,886	14,886
Charge-offs		(88)	(110)	(127)
Recoveries	175	226	744	1,003
Net (charge-offs) recoveries	175	138	634	876
Provision (recovery)	(272)	(1,036)	7,256	(2,448)
Balance at end of period	18,832	13,314	18,832	13,314	10,942
Residential Construction
Allowance for credit losses
Balance at beginning of period	10,025	8,869	5,024	8,974	8,974
Charge-offs			(304)
Recoveries	9	3	31	97
Net (charge-offs) recoveries	9	3	(273)	97
Provision (recovery)	(2,552)	(1,643)	2,731	(1,842)
Balance at end of period	7,482	7,229	7,482	7,229	5,024
Commercial Construction and Development
Allowance for credit losses
Balance at beginning of period	77,219	55,314	65,772	45,410	45,410
Charge-offs		(8)	(2,162)	(10)
Recoveries	57	67	1,208	523
Net (charge-offs) recoveries	57	59	(954)	513
Provision (recovery)	(8,611)	9,099	3,847	18,549
Balance at end of period	68,665	64,472	68,665	64,472	65,772
Consumer
Allowance for credit losses
Balance at beginning of period	12,228	24,577	23,331	22,767	22,767
Charge-offs	(2,248)	(3,129)	(6,943)	(8,875)
Recoveries	517	651	2,467	1,755
Net (charge-offs) recoveries	(1,731)	(2,478)	(4,476)	(7,120)
Provision (recovery)	8,902	656	544	7,108
Balance at end of period	19,399	22,755	19,399	22,755	23,331
Multifamily
Allowance for credit losses
Balance at beginning of period	19,761	9,767	13,766	3,684	3,684
Recoveries			66
Net (charge-offs) recoveries			66
Provision (recovery)	(2,637)	2,825	3,292	8,908
Balance at end of period	17,124	12,592	17,124	12,592	13,766
Municipal
Allowance for credit losses
Balance at beginning of period	1,779	745	900	849	849
Provision (recovery)	240	56	1,119	(48)
Balance at end of period	2,019	801	2,019	801	900
CRE Owner Occupied
Allowance for credit losses
Balance at beginning of period	91,423	70,759	71,580	58,083	58,083
Charge-offs	(558)	(91)	(951)	(126)
Recoveries	26	415	537	801
Net (charge-offs) recoveries	(532)	324	(414)	675
Provision (recovery)	(6,670)	1,932	13,055	14,257
Balance at end of period	84,221	73,015	84,221	73,015	71,580
Non Owner Occupied CRE
Allowance for credit losses
Balance at beginning of period	99,015	115,269	137,055	78,485	78,485
Charge-offs	(29)		(276)	(51)
Recoveries	247	511	346	951
Net (charge-offs) recoveries	218	511	70	900
Provision (recovery)	23,134	8,749	(14,758)	45,144
Balance at end of period	122,367	124,529	122,367	124,529	137,055
C & I
Allowance for credit losses
Balance at beginning of period	81,939	46,019	49,406	50,713	50,713
Charge-offs	(5,599)	(14,597)	(13,839)	(20,890)
Recoveries	1,447	2,632	6,401	6,628
Net (charge-offs) recoveries	(4,152)	(11,965)	(7,438)	(14,262)
Provision (recovery)	(3,111)	17,650	32,708	15,253
Balance at end of period	$ 74,676	$ 51,704	$ 74,676	$ 51,704	$ 49,406