Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Net tax credits	$ 14,000	$ 2,600	$ 1,100
Benefit from operating loss carryforwards	10,300	400
SALT DTA valuation allowance adjustment, net	(9,874)	0	0
Increase (decrease) in deferred income taxes	262,200
Deferred tax expense (benefit)	(69,664)	(4,998)	(31,236)
Tax benefit directly allocated to shareholder's equity	245,900
Valuation allowance	29,176	37,374
Increase (decrease) in valuation allowance	(8,200)
Unrecognized deferred tax liability for thrift bad-debt reserves	63,200	15,300
Cumulative taxable temporary differences	233,100	58,000
Unrecognized tax benefits that would impact effective tax rate	9,100	3,500	3,500
Interest and penalties	100	300	$ 100
Accrued interest and penalties related to UTBs	2,000	$ 1,900
Bend Financial, Inc.
Operating Loss Carryforwards [Line Items]
Valuation allowance	1,700
Sterling Merger and Bend Acquisition
Operating Loss Carryforwards [Line Items]
Deferred tax liability, net	51,900
SALT
Operating Loss Carryforwards [Line Items]
Valuation allowance	28,600
Deferred tax assets, net operating loss carryforwards subject to expiration	484,400
Federal
Operating Loss Carryforwards [Line Items]
Valuation allowance	600
Deferred tax assets, net operating loss carryforwards subject to expiration	600
SALT
Operating Loss Carryforwards [Line Items]
Deferred tax assets, operating loss carryforwards	1,000,000
Federal
Operating Loss Carryforwards [Line Items]
Deferred tax assets, operating loss carryforwards	21,900
Minimum
Operating Loss Carryforwards [Line Items]
Decrease in unrecognized tax benefits reasonably possible	700
Maximum
Operating Loss Carryforwards [Line Items]
Decrease in unrecognized tax benefits reasonably possible	$ 6,800