CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks		$ 207,128	$ 200,691
Interest-bearing deposits with other banks		38,806	56,948
Investment securities available-for-sale, at fair value (amortized cost $2,915,937 at September 30, 2020 and $2,798,298 at December 31, 2019)		3,004,963	2,852,084
Investment securities held-to-maturity (fair value $123,441 at September 30, 2020 and $142,821 at December 31, 2019)		118,072	142,862
Other investments		118,292	125,020
Loans held for sale		69,008	13,680
Loans
Total loans and leases		10,200,809	9,201,665
Loans and Leases Receivable, Allowance	[1]	168,544	57,650
Net loans and leases		10,032,265	9,144,015
Premises and equipment		209,474	214,506
Goodwill		937,771	937,771
Other Finite-Lived Intangible Assets, Gross		67,419	76,201
Accrued interest and other assets		1,122,449	747,847
Total assets		15,925,647	14,511,625
Deposits
Interest-bearing		2,632,467	2,364,881
Savings		3,446,678	2,960,979
Time		1,935,392	2,240,441
Total interest-bearing deposits		8,014,537	7,566,301
Noninterest-bearing		3,552,893	2,643,928
Total deposits		11,567,430	10,210,229
Federal funds purchased and securities sold under agreements to repurchase		247,658	165,181
FHLB short-term borrowings		0	1,151,000
Total short-term borrowings		247,658	1,316,181
Long-term debt		1,341,164	414,376
Total borrowed funds		1,588,822	1,730,557
Accrued interest and other liabilities		521,580	323,134
Total liabilities		$ 13,677,832	$ 12,263,920
Common Stock, Shares, Issued		104,281,794	104,281,794
Common Stock, Shares Authorized		160,000,000	160,000,000
SHAREHOLDERS' EQUITY
Common stock - no par value Authorized - 160,000,000 shares Issued - 104,281,794 shares in 2020 and 2019		$ 1,637,489	$ 1,640,771
Retained earnings		694,484	711,249
Accumulated other comprehensive loss		42,266	13,323
Treasury stock, at cost, 6,282,031 shares in 2020 and 5,790,796 shares in 2019		(126,424)	(117,638)
Total shareholders' equity		2,247,815	2,247,705
Total liabilities and shareholders' equity		15,925,647	14,511,625
Loans and Leases Receivable, Net of Deferred Income		10,200,809	9,201,665
Commercial real estate
Loans
Total loans and leases		4,347,125	4,194,651
Loans and Leases Receivable, Net of Deferred Income		4,347,125	4,194,651
Construction real estate
Loans
Total loans and leases		575,648	493,182
Loans and Leases Receivable, Net of Deferred Income		575,648	493,182
Commercial
Loans
Total loans and leases		3,292,313	2,465,877
Loans and Leases Receivable, Net of Deferred Income		3,292,313	2,465,877
Lease financing
Loans
Total loans and leases		74,742	88,364
Loans and Leases Receivable, Net of Deferred Income		74,742	88,364
Residential real estate
Loans
Total loans and leases		1,027,702	1,055,949
Loans and Leases Receivable, Net of Deferred Income		1,027,702	1,055,949
Home equity
Loans
Total loans and leases		754,743	771,869
Loans and Leases Receivable, Net of Deferred Income		754,743	771,869
Installment
Loans
Total loans and leases		84,629	82,589
Loans and Leases Receivable, Net of Deferred Income		84,629	82,589
Credit card
Loans
Total loans and leases		43,907	49,184
Loans and Leases Receivable, Net of Deferred Income		$ 43,907	$ 49,184

[1] Beginning January 1, 2020, calculation is based on current expected loss methodology. Prior to January 1, 2020, calculation was based on incurred loss methodology.