Consolidated Condensed Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	$ 6,384	$ 4,586
Amortization of investment securities, net	(5,077)	(4,631)
Depreciation	6,676	6,446
Depreciation of premises and equipment	(2,052)	(6)
Amortization of investment securities, net	1,102	932
Realized net investment securities losses	421	2,271
Gain on equity securities, net	5,309	4,633
Loan originations to be sold in secondary market	(224,314)	(153,093)
Proceeds from sale of loans in secondary market	214,266	154,544
Share-based compensation expense	3,752	3,064
OREO valuation adjustments	123	398
Loss (gain) on sale of OREO, net	224	(4,093)
Bank owned life insurance income	(3,399)	(4,625)
Investment in qualified affordable housing tax credits amortization	5,438	5,553
Changes in assets and liabilities:
Decrease in other assets	5,127	6,594
Increase in other liabilities	1,128	4,536
Net cash provided by operating activities	73,971	96,978
Investing activities:
Payments for (Proceeds from) Federal Home Loan Bank Stock	9,964	7,004
Proceeds from sales of investment securities	91,110	244,399
Proceeds from Sale, Maturity and Collection of Investments [Abstract]
Available-for-sale securities	145,851	151,860
Held-to-maturity securities	475	10,102
Payments to Acquire Investments [Abstract]
Payments to Acquire Debt Securities, Available-for-sale	0	373,372
Payments to Acquire Held-to-maturity Securities	0	(4,946)
Equity securities	0	(2,590)
Payments to Acquire Federal Reserve Bank Stock	(5,180)	0
Increase (Decrease) in Equity Securities, FV-NI	6,145	1,141
Net loan originations, portfolio loans	(112,767)	12,027
Payments for Affordable Housing Programs	(3,843)	0
Proceeds from the sale of OREO	1,098	11,919
Life insurance death benefits	1,344	4,028
Payments to Acquire Businesses, Net of Cash Acquired [Abstract]	(4,831)	12,270
Purchases of premises and equipment	(11,641)	(7,145)
Net cash provided by investing activities	117,725	66,697
Financing activities:
Net increase in deposits	275,207	177,626
Net decrease in short-term borrowings	(64,891)	(211,471)
Proceeds from issuance of long-term debt	50,000	25,000
Repayments of Long-term Debt	(152,500)	(125,000)
Payment, Tax Withholding, Share-based Payment Arrangement	(827)	(610)
Repurchase of common shares to be held as treasury shares	(40,535)	(5,784)
Cash dividends paid	(52,638)	(47,944)
Net cash provided by (used in) financing activities	13,816	(188,183)
Increase in cash and cash equivalents	205,512	(24,508)
Cash and cash equivalents at beginning of year	167,214	169,112
Cash and cash equivalents at end of period	372,726	144,604
Supplemental disclosures of cash flow information:
Cash paid for interest	47,891	30,424
Income Taxes Paid	9,261	5,525
Debt Securities, Held-to-maturity, Transfer, Amount	349,773	0
Non cash activities:
Real Estate Owned, Transfer to Real Estate Owned	951	1,037
Other Significant Noncash Transaction, Value of Consideration Received	11,351	0
Other repossessed assets, transfer to repossessed assets	0	11,379
Affordable Housing Program Obligation, Period Increase (Decrease)	10,000	8,000
Consumer Portfolio Segment [Member]
Changes in assets and liabilities:
Increase in prepaid dealer premiums	(4,625)	(1,399)
Mortgage Loans on Real Estate [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of loans in secondary market	$ 4,658	$ 3,604