Loans Receivable, Net - ACL Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for credit losses
Balance at beginning of period	$ 176,159	$ 156,446	$ 172,665	$ 158,243
Provision for credit losses	(1,353)	(5,723)	2,991	(5,234)
Charge-offs	(4,346)	(1,700)	(7,040)	(5,946)
Recoveries	2,503	2,425	4,347	4,385
Balance at end of period	172,963	151,448	172,963	151,448
Residential real estate
Allowance for credit losses
Balance at beginning of period	16,227	9,018	16,458	9,604
Provision for credit losses	686	884	437	302
Charge-offs	0	0	0	(38)
Recoveries	46	241	64	275
Balance at end of period	16,959	10,143	16,959	10,143
Commercial real estate
Allowance for credit losses
Balance at beginning of period	122,172	95,251	117,901	86,999
Provision for credit losses	(385)	1,269	3,542	8,732
Charge-offs	(1,642)	(41)	(1,642)	(41)
Recoveries	1,114	118	1,458	907
Balance at end of period	121,259	96,597	121,259	96,597
Other commercial
Allowance for credit losses
Balance at beginning of period	23,882	39,385	24,703	49,133
Provision for credit losses	(2,545)	(8,319)	(3,548)	(15,584)
Charge-offs	(804)	(351)	(1,603)	(3,113)
Recoveries	546	1,268	1,527	1,547
Balance at end of period	21,079	31,983	21,079	31,983
Home equity
Allowance for credit losses
Balance at beginning of period	9,173	8,068	8,566	8,182
Provision for credit losses	41	(278)	600	(367)
Charge-offs	(45)	0	(45)	(45)
Recoveries	164	47	212	67
Balance at end of period	9,333	7,837	9,333	7,837
Other consumer
Allowance for credit losses
Balance at beginning of period	4,705	4,724	5,037	4,325
Provision for credit losses	850	721	1,960	1,683
Charge-offs	(1,855)	(1,308)	(3,750)	(2,709)
Recoveries	633	751	1,086	1,589
Balance at end of period	$ 4,333	$ 4,888	$ 4,333	$ 4,888