Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities
Net income	$ 17,616	$ 16,026
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion and amortization	410	361
Provision for loan losses	181	681
Equipment and software related expense	1,270	1,525
Deferred income tax expense	287	2,931
Net periodic employee benefit cost	111	114
Realized investment securities gains	0	(4,276)
Stock-compensation expense	793	780
Excess tax benefit from stock-compensation expense	(155)	(189)
Proceeds from life insurance	210	1,137
Increase in value of bank-owned life insurance	(612)	(749)
Loans originated for sale	(2,606)	(3,951)
Proceeds from the sale of loans originated for sale	2,874	6,118
Gain on sale of loans	(79)	(167)
Change in accrued interest receivable	(305)	(236)
Change in other assets	(11,128)	(131)
Change in other liabilities	3,504	383
Net Cash Provided by Operating Activities	12,371	20,357
Investing Activities
Proceeds from sales of securities available-for-sale	0	5,576
Proceeds from maturities and calls of securities available-for-sale	21,230	23,390
Proceeds from maturities and calls of securities held-to-maturity	2,142	2,823
Purchases of securities available-for-sale	(35,721)	(39,747)
Net increase in loans	(10,827)	(30,826)
Purchases of premises and equipment	(1,561)	(2,111)
Disposals of premises and equipment	55	1,781
Net Cash (Used in) Investing Activities	(24,682)	(39,114)
Financing Activities
Net increase in non-interest-bearing deposits	36,570	42,505
Net increase in interest-bearing deposits	94,758	118,616
Net (decrease) in short-term borrowings	(56,844)	(61,619)
Proceeds from issuance of common stock	0	28,408
Purchases of treasury stock	(13,997)	0
Proceeds from stock option exercises	280	38
Dividends paid	(7,186)	(6,518)
Net Cash Provided by Financing Activities	53,581	121,430
Increase in Cash and Cash Equivalents	41,270	102,673
Cash and cash equivalents at beginning of period	82,508	88,139
Cash and Cash Equivalents at End of Period	$ 123,778	$ 190,812