Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities
Net Income	$ 103,481	$ 47,764
Provision for credit losses	1,353	49,038
Deferred tax expense (benefit)	1,057	(5,059)
Depreciation and amortization	8,784	8,676
Net gains on securities and other assets	(17,093)	(12,608)
Net amortization of premiums and discounts on securities	3,693	4,662
Income from increase in cash surrender value of bank owned life insurance	(4,617)	(4,699)
Decrease (increase) in interest receivable	4,590	(13,105)
Mortgage loans originated for sale	(308,744)	(287,196)
Proceeds from sale of mortgage loans	338,115	281,424
Increase in interest payable	929	575
Increase (decrease) in income taxes payable	2,142	(536)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	14,267	(1,888)
Net cash provided by operating activities	119,423	70,824
Investing Activities
Proceeds from sale and maturity of held-to-maturity securities	89,698	76,841
Payments to Acquire Held-to-maturity Securities	(337,054)	(9,621)
Proceeds from Sale of Available-for-sale Securities	0	0
Proceeds from maturities and redemptions of available-for-sale securities	353,788	272,544
Purchases of available-for-sale securities	(667,861)	(282,461)
Purchases of FHLB stock	(3,552)	(21,903)
Proceeds from the redemption of FHLB stock	3,060	25,698
Proceeds from Life Insurance Policy	5,208	1,147
Proceeds from Sale of Loans Receivable	52,919	25,534
Proceeds from sale of other assets	6,620	4,875
Net increase in loans	(37,782)	(798,377)
Payments for Purchase of Other Assets	(6,056)	(6,570)
Net cash used in investing activities	(541,012)	(712,293)
Financing Activities
Net increase (decrease) in other short-term borrowings	381	(79,497)
Net increase in deposits	497,915	1,026,580
Repayments of other long-term debt	(50,512)	(493)
Repayments of Long-term Capital Lease Obligations	346	321
Payments of Dividends	(32,673)	(32,408)
Proceeds from reissuance of treasury stock	222	222
Purchase of treasury stock	(15,305)	(14,373)
Net cash provided by financing activities	399,682	899,710
Net (decrease) increase in cash and cash equivalents	(21,907)	258,241
Cash and cash equivalents at January 1	356,581	121,856
Cash and cash equivalents at September 30	$ 334,674	$ 380,097