CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Cash and due from banks	$ 279,629	$ 246,716
Interest-bearing deposits in other banks	1,254,047	1,011,753
Available-for-sale, at fair value (amortized cost: $4,267,809 as of June 30, 2022 and $8,560,733 as of December 31, 2021)	3,967,746	8,428,032
Held-to-maturity, at amortized cost (fair value: $3,910,780 as of June 30, 2022 and nil as of December 31, 2021)	4,093,215
Loans held for sale	180	538
Loans and leases	13,262,781	12,961,999
Less: allowance for credit losses	148,942	157,262
Net loans and leases	13,113,839	12,804,737
Premises and equipment, net	310,047	318,448
Other real estate owned and repossessed personal property		175
Accrued interest receivable	63,240	63,158
Bank-owned life insurance	470,542	471,819
Goodwill	995,492	995,492
Mortgage servicing rights	7,152	8,302
Other assets	822,404	643,240
Total assets	25,377,533	24,992,410
Deposits:
Interest-bearing	12,990,571	12,422,283
Noninterest-bearing	9,610,883	9,393,863
Total deposits	22,601,454	21,816,146
Retirement benefits payable	134,151	134,491
Other liabilities	389,317	384,861
Total liabilities	23,124,922	22,335,498
Commitments and contingent liabilities (Note 11)
Stockholders' equity
Common stock ($0.01 par value; authorized 300,000,000 shares; issued/outstanding: 140,943,908 / 127,451,087 as of June 30, 2022; issued/outstanding: 140,581,715 / 127,502,472 as of December 31, 2021)	1,409	1,406
Additional paid-in capital	2,533,407	2,527,663
Retained earnings	654,777	604,534
Accumulated other comprehensive loss, net	(571,457)	(121,693)
Treasury stock (13,492,821 shares as of June 30, 2022 and 13,079,243 shares as of December 31, 2021)	(365,525)	(354,998)
Total stockholders' equity	2,252,611	2,656,912
Total liabilities and stockholders' equity	$ 25,377,533	$ 24,992,410