Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 423,802	$ 396,836
Interest-bearing deposits in other banks	259,713	606,801
Investment securities	4,395,476	4,498,342
Loans held for sale	215	432
Loans and leases	13,264,609	13,076,191
Less: allowance for loan and lease losses	138,535	141,718
Net loans and leases	13,126,074	12,934,473
Premises and equipment, net	313,200	304,996
Other real estate owned and repossessed personal property		751
Accrued interest receivable	49,205	48,920
Bank-owned life insurance	450,722	446,076
Goodwill	995,492	995,492
Mortgage servicing rights	14,573	16,155
Other assets	497,895	446,404
Total assets	20,526,367	20,695,678
Deposits:
Interest-bearing	11,028,921	11,142,127
Noninterest-bearing	5,763,157	6,007,941
Total deposits	16,792,078	17,150,068
Short-term borrowings	200,000
Long-term borrowings	400,028	600,026
Retirement benefits payable	128,610	127,909
Other liabilities	346,210	292,836
Total liabilities	17,866,926	18,170,839
Commitments and contingent liabilities (Note 13)
Stockholders' equity
Common stock ($0.01 par value; authorized 300,000,000 shares; issued/outstanding: 139,857,673 / 133,508,212 as of June 30, 2019; issued/outstanding: 139,656,674 / 134,874,302 as of December 31, 2018)	1,399	1,397
Additional paid-in capital	2,499,946	2,495,853
Retained earnings	363,748	291,919
Accumulated other comprehensive loss, net	(31,984)	(132,195)
Treasury stock (6,349,461 shares as of June 30, 2019 and 4,782,372 shares as of December 31, 2018)	(173,668)	(132,135)
Total stockholders' equity	2,659,441	2,524,839
Total liabilities and stockholders' equity	$ 20,526,367	$ 20,695,678