CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Loans and Leases Receivable, Net of Deferred Income	$ 9,511,510	$ 9,900,970
ASSETS
Cash and due from banks	206,918	231,054
Interest-bearing deposits with other banks	38,610	20,305
Investment securities available-for-sale, at fair value (amortized cost $3,885,363 at June 30, 2021 and $3,330,029 at December 31, 2020)	3,955,839	3,424,580
Investment securities held-to-maturity (fair value $115,171 at June 30, 2021 and $136,698 at December 31, 2020)	112,456	131,687
Other investments	129,432	133,198
Loans held for sale	31,546	41,103
Loans
Total loans and leases	9,511,510	9,900,970
Loans and Leases Receivable, Allowance	(159,590)	(175,679)
Net loans and leases	9,351,920	9,725,291
Premises and equipment	192,238	207,211
Goodwill	937,771	937,771
Other Finite-Lived Intangible Assets, Gross	59,391	64,552
Accrued interest and other assets	1,021,798	1,056,382
Total assets	16,037,919	15,973,134
Deposits
Interest-bearing	2,963,151	2,914,787
Savings	4,093,229	3,680,774
Time	1,548,109	1,872,733
Total interest-bearing deposits	8,604,489	8,468,294
Noninterest-bearing	3,901,691	3,763,709
Total deposits	12,506,180	12,232,003
Federal funds purchased and securities sold under agreements to repurchase	255,791	166,594
FHLB short-term borrowings	217,000	0
Total short-term borrowings	472,791	166,594
Long-term debt	313,039	776,202
Total borrowed funds	785,830	942,796
Accrued interest and other liabilities	476,402	516,265
Total liabilities	13,768,412	13,691,064
SHAREHOLDERS' EQUITY
Authorized - 160,000,000 shares; Issued - 104,281,794 shares in 2021 and 2020	1,635,470	1,638,947
Retained earnings	773,857	720,429
Accumulated other comprehensive loss	30,735	48,664
Treasury stock, at cost, 8,082,285 shares in 2021 and 6,259,865 shares in 2020	(170,555)	(125,970)
Total shareholders' equity	2,269,507	2,282,070
Total liabilities and shareholders' equity	16,037,919	15,973,134
Commercial real estate
Loans and Leases Receivable, Net of Deferred Income	4,332,561	4,307,858
Loans
Total loans and leases	4,332,561	4,307,858
Construction real estate
Loans and Leases Receivable, Net of Deferred Income	630,329	636,096
Loans
Total loans and leases	630,329	636,096
Commercial
Loans and Leases Receivable, Net of Deferred Income	2,701,203	3,007,509
Loans
Total loans and leases	2,701,203	3,007,509
Lease financing
Loans and Leases Receivable, Net of Deferred Income	68,229	72,987
Loans
Total loans and leases	68,229	72,987
Residential real estate
Loans and Leases Receivable, Net of Deferred Income	932,112	1,003,086
Loans
Total loans and leases	932,112	1,003,086
Home equity
Loans and Leases Receivable, Net of Deferred Income	711,756	743,099
Loans
Total loans and leases	711,756	743,099
Installment
Loans and Leases Receivable, Net of Deferred Income	89,143	81,850
Loans
Total loans and leases	89,143	81,850
Credit card
Loans and Leases Receivable, Net of Deferred Income	46,177	48,485
Loans
Total loans and leases	$ 46,177	$ 48,485