Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 396,836	$ 367,084
Interest-bearing deposits in other banks	606,801	667,560
Investment securities	4,498,342	5,234,658
Loans held for sale	432	556
Loans and leases	13,076,191	12,277,369
Less: allowance for loan and lease losses	141,718	137,253
Net loans and leases	12,934,473	12,140,116
Premises and equipment, net	304,996	289,215
Other real estate owned and repossessed personal property	751	329
Accrued interest receivable	48,920	47,987
Bank-owned life insurance	446,076	438,010
Goodwill	995,492	995,492
Mortgage servicing rights	16,155	13,196
Other assets	446,404	355,258
Total assets	20,695,678	20,549,461
Deposits:
Interest-bearing	11,142,127	11,485,269
Noninterest-bearing	6,007,941	6,126,853
Total deposits	17,150,068	17,612,122
Long-term borrowings	600,026	34
Retirement benefits payable	127,909	134,218
Other liabilities	292,836	270,536
Total liabilities	18,170,839	18,016,910
Commitments and contingent liabilities (Notes 14 and 18)
Stockholders' equity
Common stock ($0.01 par value; authorized 300,000,000 shares; issued/outstanding: 139,656,674 / 134,874,302 as of December 31, 2018; issued/outstanding: 139,599,454 / 139,588,782 as of December 31, 2017)	1,397	1,396
Additional paid-in capital	2,495,853	2,488,643
Retained earnings	291,919	139,177
Accumulated other comprehensive loss, net	(132,195)	(96,383)
Treasury stock (4,782,372 shares as of December 31, 2018 and 10,672 shares as of December 31, 2017)	(132,135)	(282)
Total stockholders' equity	2,524,839	2,532,551
Total liabilities and stockholders' equity	$ 20,695,678	$ 20,549,461