Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 370,219	$ 382,598
Interest bearing cash and temporary investments	2,202,962	980,158
Total cash and cash equivalents	2,573,181	1,362,756
Investment securities
Equity and other, at fair value	83,077	80,165
Available for sale, at fair value	2,932,558	2,814,682
Held to maturity, at amortized cost	3,034	3,260
Loans held for sale (at fair value: $688,079 and $513,431)	766,225	513,431
Loans and leases	21,779,367	21,195,684
Allowance for credit losses on loans and leases	(328,401)	(157,629)
Net loans and leases	21,450,966	21,038,055
Restricted equity securities	41,666	46,463
Premises and equipment, net	178,050	201,460
Operating lease right-of-use assets	104,937	110,718
Goodwill	2,715	1,787,651
Other intangible assets, net	13,360	18,346
Residential mortgage servicing rights, at fair value	92,907	115,010
Bank owned life insurance	323,470	320,611
Other assets	669,029	434,201
Total assets	29,235,175	28,846,809
Deposits, Interest-bearing and Noninterest-bearing, Alternative [Abstract]
Noninterest bearing	9,632,773	6,913,375
Interest bearing	14,989,428	15,568,129
Total deposits	24,622,201	22,481,504
Securities sold under agreements to repurchase	375,384	311,308
Borrowings	771,482	906,635
Junior subordinated debentures, at fair value	255,217	274,812
Junior subordinated debentures, at amortized cost	88,268	88,496
Operating lease liabilities	113,593	119,429
Deferred tax liability, net	5,441	52,928
Other liabilities	299,012	297,782
Total liabilities	26,530,598	24,532,894
COMMITMENTS AND CONTINGENCIES (NOTE 18)
SHAREHOLDERS' EQUITY
Common Stock, Value, Issued	3,514,599	3,514,000
(Accumulated deficit) retained earnings	(932,767)	770,366
Accumulated other comprehensive income	122,745	29,549
Total shareholders' equity	2,704,577	4,313,915
Total liabilities and shareholders' equity	$ 29,235,175	$ 28,846,809
Common stock, par value (in dollar per share)	$ 0	$ 0
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares, Issued	220,226,335	220,229,282
Common Stock, Shares, Outstanding	220,226,335	220,229,282