Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities
Net income	$ 38,590	$ 30,714
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion and amortization	716	433
(Recovery of) provision for loan losses	(1,882)	1,191
Depreciation of premises and equipment	2,555	3,036
Deferred income tax expense	781	3,387
Net periodic employee benefit cost	342	225
Unrealized gains recognized on securities still held	(772)
Realized investment securities gains	0	(4,276)
Stock-compensation expense	1,242	1,210
Excess tax benefit from stock-compensation expense	(154)	(550)
Proceeds from life insurance	210	1,625
Increase in value of bank-owned life insurance	(1,333)	(1,228)
Loans originated for sale	(5,869)	(9,384)
Proceeds from the sale of loans originated for sale	6,011	11,583
Gain on sale of loans	(163)	(309)
Change in accrued interest receivable	(125)	286
Change in other assets	(13,090)	2,576
Change in other liabilities	8,491	(179)
Net Cash Provided by Operating Activities	35,550	40,340
Investing Activities
Proceeds from sales of securities available-for-sale	0	5,576
Proceeds from maturities and calls of securities available-for-sale	36,472	35,491
Proceeds from maturities and calls of securities held-to-maturity	4,362	5,301
Purchases of securities available-for-sale	(67,619)	(89,517)
Net increase in loans	(27,473)	(40,321)
Purchases of premises and equipment	(2,710)	(3,070)
Disposals of premises and equipment	510	2,282
Net Cash Used in Investing Activities	(56,458)	(84,258)
Financing Activities
Net increase in non-interest-bearing deposits	17,975	15,937
Net increase in interest-bearing deposits	88,169	30,573
Net increase (decrease) in short-term borrowings	125,791	(24,001)
Proceeds from issuance of common stock	0	28,408
Purchases of treasury stock	(14,690)	0
Proceeds from stock option exercises	968	597
Dividends paid	(14,289)	(13,375)
Net Cash Provided by Financing Activities	203,924	38,139
Increase (Decrease) in Cash and Cash Equivalents	183,016	(5,779)
Cash and cash equivalents at beginning of period	82,508	88,139
Cash and Cash Equivalents at End of Period	$ 265,524	$ 82,360