Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 21,042	$ 50,209
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	49,515	6,286
Depreciation of premises and equipment	3,620	3,983
Net amortization of investment securities premiums and discounts	1,755	1,375
Net gain on sales of investment securities	(817)	(41)
Net gain on mortgage banking activities	(12,119)	(2,908)
Bank owned life insurance income	(2,207)	(2,438)
Stock-based compensation	1,853	1,918
Intangible expenses	934	1,221
Other adjustments to reconcile net income to cash used in operating activities	(3,392)	(911)
Originations of loans held for sale	(322,135)	(139,744)
Proceeds from the sale of loans held for sale	321,233	140,906
Contributions to pension and other postretirement benefit plans	(203)	(199)
Increase in accrued interest receivable and other assets	(18,774)	(3,259)
Increase (decrease) in accrued interest payable and other liabilities	5,786	(2,486)
Net cash provided by operating activities	46,091	53,912
Cash flows from investing activities:
Net capital expenditures	(2,363)	(1,647)
Proceeds from maturities, calls and principal repayments of securities held-to-maturity	56,933	20,903
Proceeds from maturities, calls and principal repayments of securities available-for-sale	43,853	49,127
Proceeds from sales of securities available-for-sale	65,621	24,987
Purchases of investment securities held-to-maturity	(43,116)	(62,919)
Purchases of investment securities available-for-sale	(49,329)	(997)
Proceeds from sales of money market mutual funds	10,487	1,032
Purchases of money market mutual funds	(10,971)	(1,314)
Net decrease in other investments	(1,469)	(917)
Proceeds from sale of portfolio loans	14,416	0
Net increase in loans and leases	(851,403)	(246,453)
Proceeds from sales of other real estate owned	75	670
Net cash used in investing activities	(767,266)	(217,528)
Cash flows from financing activities:
Net increase in deposits	851,521	452,101
Net decrease in short-term borrowings	(999)	(170,798)
Proceeds from issuance of long-term debt	125,000	25,000
Repayment of long-term debt	(70,000)	(10,000)
Proceeds from issuance of subordinated notes	98,448	0
Payment of contingent consideration on acquisitions	(91)	(97)
Purchases of treasury stock	(4,452)	(1,776)
Stock issued under dividend reinvestment and employee stock purchase plans	1,757	1,669
Proceeds from exercise of stock options	94	1,005
Cash dividends paid	(17,555)	(17,574)
Net cash provided by financing activities	983,723	279,530
Net increase in cash and cash equivalents	262,548	115,914
Cash and cash equivalents at beginning of year	125,128	109,420
Cash and cash equivalents at end of period	387,676	225,334
Supplemental disclosures of cash flow information:
Cash paid for interest	23,089	33,724
Cash paid for income taxes, net of refunds	12,014	14,148
Transfer of loans to other real estate owned	8,125	0
Transfer of Portfolio Loans and Leases to Held-for-sale	$ 14,416	$ 0