Loans Receivable, Net - ACL Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for credit losses
Balance at beginning of period	$ 172,963	$ 151,448	$ 172,665	$ 158,243
Provision for credit losses	8,382	2,313	11,373	(2,921)
Charge-offs	(3,865)	(2,620)	(10,905)	(8,566)
Recoveries	711	2,468	5,058	6,853
Balance at end of period	178,191	153,609	178,191	153,609
Residential real estate
Allowance for credit losses
Balance at beginning of period	16,959	10,143	16,458	9,604
Provision for credit losses	1,473	1,703	1,910	2,005
Charge-offs	(17)	0	(17)	(38)
Recoveries	7	13	71	288
Balance at end of period	18,422	11,859	18,422	11,859
Commercial real estate
Allowance for credit losses
Balance at beginning of period	121,259	96,597	117,901	86,999
Provision for credit losses	3,093	2,931	6,635	11,663
Charge-offs	0	(162)	(1,642)	(203)
Recoveries	47	672	1,505	1,579
Balance at end of period	124,399	100,038	124,399	100,038
Other commercial
Allowance for credit losses
Balance at beginning of period	21,079	31,983	24,703	49,133
Provision for credit losses	1,785	(3,321)	(1,763)	(18,905)
Charge-offs	(1,502)	(677)	(3,105)	(3,790)
Recoveries	2	860	1,529	2,407
Balance at end of period	21,364	28,845	21,364	28,845
Home equity
Allowance for credit losses
Balance at beginning of period	9,333	7,837	8,566	8,182
Provision for credit losses	142	(124)	742	(491)
Charge-offs	0	0	(45)	(45)
Recoveries	87	152	299	219
Balance at end of period	9,562	7,865	9,562	7,865
Other consumer
Allowance for credit losses
Balance at beginning of period	4,333	4,888	5,037	4,325
Provision for credit losses	1,889	1,124	3,849	2,807
Charge-offs	(2,346)	(1,781)	(6,096)	(4,490)
Recoveries	568	771	1,654	2,360
Balance at end of period	$ 4,444	$ 5,002	$ 4,444	$ 5,002