Consolidated Statements Of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Cash Flows From Operating Activities:
Net income	$ 41,555	$ 41,573	$ 35,122
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (credit) for loan losses	33	(1,755)	4,854
Provision (credit) for deferred income taxes	(1,212)	(1,601)	1,114
Depreciation and amortization of premises and equipment	4,078	4,068	3,604
Amortization of right of use asset - operating leases	2,140
Premium amortization on investment securities, net	1,264	1,714	3,045
Net (gain) loss on sales of securities	(14)	10,406	1,866
Net gain on sale of premises and equipment		(1,176)
Stock-based compensation expense	3,050	1,814	2,434
Accretion of cash surrender value on bank-owned life insurance	(2,194)	(2,134)	(1,568)
Pension expense (credit)	404	(319)	(118)
Increase (decrease) in other liabilities	(38)	4,002	1,031
Other decreases (increases)	921	2,782	(4,212)
Net cash provided by operating activities	49,987	59,374	47,172
Available-for-sale securities:
Proceeds from sales	21,983	263,994	135,695
Proceeds from maturities and redemptions	151,214	74,639	100,994
Purchases	(95,905)	(397,174)	(144,885)
Held-to-maturity securities:
Proceeds from sales			355
Proceeds from maturities and redemptions	3,184	5,240	6,089
Purchases	(1,609)	(3,059)	(2,606)
Proceeds from sales of real estate and loans held-for-sale		8,043
Net decrease (increase) in loans	73,568	(315,389)	(411,908)
Net decrease (increase) in restricted stock	9,787	(3,372)	(5,551)
Purchases of bank-owned life insurance, net of proceeds		(18,561)	(25,000)
Purchases of premises and equipment, net	(2,875)	(5,687)	(8,891)
Net cash provided by (used in) investing activities	159,347	(391,326)	(355,708)
Cash Flows From Financing Activities:
Net increase in deposits	59,044	262,975	213,280
Net increase (decrease) in short-term borrowings	(198,213)	107,782	74,129
Proceeds from long-term debt	48,945	39,680	71,635
Repayment of long-term debt	(73,500)	(101,450)	(27,050)
Proceeds from issuance of common stock, net of shares withheld	1,420	17,777	22,988
Repurchase of common stock	(38,171)	(1,541)
Cash dividends paid	(17,249)	(15,585)	(13,703)
Net cash (used in) provided by financing activities	(217,724)	309,638	341,279
Net (decrease) increase in cash and cash equivalents	(8,390)	(22,314)	32,743
Cash and cash equivalents, beginning of year	47,358	69,672	36,929
Cash and cash equivalents, end of period	38,968	47,358	69,672
Supplemental Cash Flow Disclosures:
Cash paid for interest	43,520	35,274	21,545
Cash paid for income taxes	8,867	2,490	12,838
Operating cash flows from operating leases	2,547
Noncash investing and financing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	16,483
Cash dividends payable	4,308	4,456	3,798
Held-to-maturity securities transferred to available-for-sale	$ 3,949
Loans transferred from portfolio to held-for-sale		$ 1,151
Additions to other real estate owned			$ 5,850