Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 355,752	$ 253,827
Interest-bearing deposits in other banks	872,013	798,231
Investment securities	5,126,869	5,077,514
Loans and leases	12,062,392	11,520,378
Less: allowance for loan and lease losses	136,883	135,494
Net loans and leases	11,925,509	11,384,884
Premises and equipment, net	292,959	300,788
Other real estate owned and repossessed personal property	329	329
Accrued interest receivable	39,739	41,971
Bank-owned life insurance	432,726	429,209
Goodwill	995,492	995,492
Other intangible assets	14,877	16,809
Other assets	317,709	362,775
Total assets	20,373,974	19,661,829
Deposits:
Interest-bearing	11,580,664	10,801,915
Noninterest-bearing	5,871,598	5,992,617
Total deposits	17,452,262	16,794,532
Short-term borrowings		9,151
Long-term debt	41	41
Retirement benefits payable	134,400	132,904
Other liabilities	234,669	248,716
Total liabilities	17,821,372	17,185,344
Commitments and contingent liabilities (Note 11)
Stockholders' equity
Common stock ($0.01 par value; authorized 300,000,000 shares; issued and outstanding 139,546,615 shares and 139,530,654 shares as of June 30, 2017 and December 31, 2016, respectively)	1,395	1,395
Additional paid-in capital	2,488,091	2,484,251
Retained earnings	130,767	78,850
Accumulated other comprehensive loss, net	(67,651)	(88,011)
Total stockholders' equity	2,552,602	2,476,485
Total liabilities and stockholders' equity	$ 20,373,974	$ 19,661,829