Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
OPERATING ACTIVITIES
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 85,795	$ 229,342
INVESTING ACTIVITIES
Net (increase) decrease in loans held for investment	(465,440)	460,772
Available-for-sale debt securities:
Proceeds from maturities, prepayments and calls	344,948	439,101
Purchases of securities	(446,268)	(1,457,566)
Held-to-maturity debt securities:
Proceeds from maturities, prepayments and calls	50,295	55,952
Purchases of securities	(328,238)	(228,307)
Proceeds from bank owned life insurance	7,816
Purchases of premises and equipment – net	(2,807)	(4,603)
Net cash used in investing activities	(839,694)	(734,651)
FINANCING ACTIVITIES
Increase in deposits	4,596	891,121
Repayment of Federal Home Loan Bank borrowings	(61,318)	(235,105)
Increase (Decrease) in other short-term borrowings	6,071	(106,683)
Principal repayments of finance lease obligations	(214)	(219)
Issuance of subordinated debt, net of issuance costs	147,655
Dividends paid to common shareholders	(41,135)	(43,509)
Dividends paid to preferred shareholders	(5,063)	(5,063)
Treasury shares purchased - net	(98,042)	(54,376)
Net cash (used in) provided by financing activities	(47,450)	446,166
Net decrease in cash, cash equivalents and restricted cash	(801,349)	(59,143)
Cash, cash equivalents and restricted cash at beginning of the period	1,251,358	905,447
Cash, cash equivalents and restricted cash at end of the period	450,009	846,304
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	10,484	18,917
Income taxes paid	15,190	22,055
Transfers of loans to other real estate owned	$ 87	$ 466