Consolidated Statements Of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows From Operating Activities:
Net income	$ 10,841,000	$ 11,111,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (credit) for loan losses	(457,000)	1,512,000
Provision (credit) for deferred income taxes	512,000	(3,301,000)
Depreciation and amortization of premises and equipment	987,000	917,000
Amortization of right of use asset - operating leases	522,000
Premium amortization on investment securities, net	284,000	466,000
Stock-based compensation expense	1,295,000	1,128,000
Common stock issued in lieu of cash for director fees	32,000	16,000
Accretion of cash surrender value on bank-owned life insurance	(535,000)	(488,000)
Pension expense (credit)	101,000	(80,000)
(Increase) decrease in other assets	(231,000)	1,944,000
Decrease in accrued expenses and other liabilities	(2,381,000)	(478,000)
Net cash provided by operating activities	10,970,000	12,747,000
Proceeds from maturities and redemptions of investment securities:
Held-to-maturity	386,000	1,054,000
Available-for-sale	18,747,000	17,032,000
Purchases of investment securities:
Held-to-maturity		(338,000)
Available-for-sale	(2,526,000)	(122,960,000)
Net decrease (increase) in loans	8,899,000	(184,761,000)
Proceeds from sale of other real estate owned		5,125,000
Net decrease in restricted stock	11,275,000	4,130,000
Purchases of premises and equipment, net	(801,000)	(1,289,000)
Purchases of bank-owned life insurance		(20,000,000)
Net cash provided by (used in) investing activities	35,980,000	(302,007,000)
Cash Flows From Financing Activities:
Net increase in deposits	222,237,000	381,652,000
Net decrease in short-term borrowings	(253,747,000)	(108,364,000)
Proceeds from long-term debt	14,445,000	39,680,000
Repayment of long-term debt	(10,000,000)	(26,450,000)
Proceeds from issuance of common stock, net	1,434,000	7,319,000
Proceeds from exercise of stock options	203,000	96,000
Shares withheld upon the vesting and conversion of RSUs	(830,000)	(722,000)
Repurchases of common stock	(15,331,000)
Cash dividends paid	(8,702,000)	(3,705,000)
Net cash (used in) provided by financing activities	(50,291,000)	289,506,000
Net (decrease) increase in cash and cash equivalents	(3,341,000)	246,000
Cash and cash equivalents, beginning of year	47,358,000	69,672,000
Cash and cash equivalents, end of period	44,017,000	69,918,000
Supplemental Cash Flow Disclosures:
Cash paid for interest	10,896,000	7,091,000
Operating cash flows from operating leases	712,000
Noncash investing and financing activities:
Right-of-use assets obtained in exchange for operating lease liabilities	15,713,000
Cash dividends payable	$ 5,000	$ 3,859,000