Loans Receivable, Net - ACL Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Allowance for credit losses
Balance at beginning of period	$ 189,385	$ 172,963	$ 182,283	$ 172,665
Provision for credit losses	5,095	8,382	16,609	11,373
Charge-offs	(3,201)	(3,865)	(10,284)	(10,905)
Recoveries	992	711	3,663	5,058
Balance at end of period	192,271	178,191	192,271	178,191
Residential real estate
Allowance for credit losses
Balance at beginning of period	20,847	16,959	19,683	16,458
Provision for credit losses	848	1,473	2,021	1,910
Charge-offs	0	(17)	(20)	(17)
Recoveries	2	7	13	71
Balance at end of period	21,697	18,422	21,697	18,422
Commercial real estate
Allowance for credit losses
Balance at beginning of period	129,598	121,259	125,816	117,901
Provision for credit losses	1,415	3,093	5,369	6,635
Charge-offs	(203)	0	(619)	(1,642)
Recoveries	42	47	286	1,505
Balance at end of period	130,852	124,399	130,852	124,399
Other commercial
Allowance for credit losses
Balance at beginning of period	21,797	21,079	21,454	24,703
Provision for credit losses	306	1,785	1,845	(1,763)
Charge-offs	(654)	(1,502)	(2,895)	(3,105)
Recoveries	322	2	1,367	1,529
Balance at end of period	21,771	21,364	21,771	21,364
Home equity
Allowance for credit losses
Balance at beginning of period	11,053	9,333	10,759	8,566
Provision for credit losses	534	142	881	742
Charge-offs	0	0	(102)	(45)
Recoveries	37	87	86	299
Balance at end of period	11,624	9,562	11,624	9,562
Other consumer
Allowance for credit losses
Balance at beginning of period	6,090	4,333	4,571	5,037
Provision for credit losses	1,992	1,889	6,493	3,849
Charge-offs	(2,344)	(2,346)	(6,648)	(6,096)
Recoveries	589	568	1,911	1,654
Balance at end of period	$ 6,327	$ 4,444	$ 6,327	$ 4,444