Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 336,555	$ 396,836
Interest-bearing deposits in other banks	281,312	606,801
Investment securities	4,485,660	4,498,342
Loans held for sale		432
Loans and leases	13,197,454	13,076,191
Less: allowance for loan and lease losses	141,546	141,718
Net loans and leases	13,055,908	12,934,473
Premises and equipment, net	310,902	304,996
Other real estate owned and repossessed personal property	124	751
Accrued interest receivable	49,489	48,920
Bank-owned life insurance	447,936	446,076
Goodwill	995,492	995,492
Mortgage servicing rights	15,399	16,155
Other assets	462,359	446,404
Total assets	20,441,136	20,695,678
Deposits:
Interest-bearing	10,951,764	11,142,127
Noninterest-bearing	5,843,480	6,007,941
Total deposits	16,795,244	17,150,068
Long-term borrowings	600,028	600,026
Retirement benefits payable	127,845	127,909
Other liabilities	304,817	292,836
Total liabilities	17,827,934	18,170,839
Commitments and contingent liabilities (Note 12)
Stockholders' equity
Common stock ($0.01 par value; authorized 300,000,000 shares; issued/outstanding: 139,851,508 / 135,012,015 as of March 31, 2019; issued/outstanding: 139,656,674 / 134,874,302 as of December 31, 2018)	1,399	1,397
Additional paid-in capital	2,497,770	2,495,853
Retained earnings	326,451	291,919
Accumulated other comprehensive loss, net	(78,754)	(132,195)
Treasury stock (4,839,493 shares as of March 31, 2019 and 4,782,372 shares as of December 31, 2018)	(133,664)	(132,135)
Total stockholders' equity	2,613,202	2,524,839
Total liabilities and stockholders' equity	$ 20,441,136	$ 20,695,678