Loans Receivable, Net - ACL Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Allowance for credit losses
Balance at beginning of period	$ 198,779	$ 186,604	$ 192,757	$ 182,283	$ 182,283
Acquisitions			3
Provision for credit losses	5,066	5,254	14,157	11,514
Charge-offs	(4,135)	(3,790)	(8,430)	(7,083)
Recoveries	1,245	1,317	2,468	2,671
Balance at end of period	200,955	189,385	200,955	189,385	192,757
Residential real estate
Allowance for credit losses
Balance at beginning of period	24,166	19,974	22,325	19,683	19,683
Acquisitions			0
Provision for credit losses	471	880	2,308	1,173
Charge-offs	0	(15)	0	(20)	(20)
Recoveries	16	8	20	11
Balance at end of period	24,653	20,847	24,653	20,847	22,325
Commercial real estate
Allowance for credit losses
Balance at beginning of period	135,153	130,253	130,924	125,816	125,816
Acquisitions			3
Provision for credit losses	1,582	(750)	5,789	3,954
Charge-offs	(395)	(69)	(395)	(416)	(2,080)
Recoveries	6	164	25	244
Balance at end of period	136,346	129,598	136,346	129,598	130,924
Other commercial
Allowance for credit losses
Balance at beginning of period	22,094	21,164	21,194	21,454	21,454
Acquisitions			0
Provision for credit losses	1,081	1,660	3,374	1,539
Charge-offs	(1,461)	(1,469)	(3,393)	(2,241)	(3,891)
Recoveries	505	442	1,044	1,045
Balance at end of period	22,219	21,797	22,219	21,797	21,194
Home equity
Allowance for credit losses
Balance at beginning of period	10,999	10,570	11,766	10,759	10,759
Acquisitions			0
Provision for credit losses	210	577	(554)	347
Charge-offs	0	(98)	(25)	(102)	(129)
Recoveries	52	4	74	49
Balance at end of period	11,261	11,053	11,261	11,053	11,766
Other consumer
Allowance for credit losses
Balance at beginning of period	6,367	4,643	6,548	4,571	4,571
Acquisitions			0
Provision for credit losses	1,722	2,887	3,240	4,501
Charge-offs	(2,279)	(2,139)	(4,617)	(4,304)	(8,975)
Recoveries	666	699	1,305	1,322
Balance at end of period	$ 6,476	$ 6,090	$ 6,476	$ 6,090	$ 6,548