Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 14,808	$ 10,947
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	942	946
Net gain on sale of other real estate owned	(137)	(191)
Writedown of other real estate owned	199	188
Provision for loan losses	300	600
Deferred tax (benefit) expense	(305)	368
Net amortization of securities	915	1,114
Stock based compensation expense	28	42
(Increase) decrease in taxes receivable	(1,787)	(411)
Decrease in interest receivable	862	328
Increase (decrease) in interest payable	128	(16)
Increase in other assets	(946)	(997)
Decrease in accrued expenses and other liabilities	(3,039)	(1,602)
Total adjustments	(2,840)	369
Net cash provided by operating activities	11,968	11,316
Cash flows from investing activities:
Proceeds from calls of securities available for sale	25,028	20,770
Proceeds from maturities of securities available for sale	25,000	0
Proceeds from calls and maturities of held to maturity securities	1,377	2,220
Purchases of securities available for sale	(45,224)	(47,905)
Net increase in loans	(31,151)	(19,579)
Proceeds from dispositions of other real estate owned	1,486	1,867
Purchases of bank premises and equipment	(1,025)	(655)
Net cash (used in) provided by investing activities	(24,509)	(43,282)
Cash flows from financing activities:
Net increase in deposits	61,754	2,306
Net (decrease) increase in short-term borrowings	(39,081)	11,540
Proceeds from exercise of stock options	20	1,503
Stock based award tax withholding payments	0	(312)
Proceeds from sale of treasury stock	594	633
Purchases of treasury stock	0	(1,503)
Dividends paid	(6,316)	(6,284)
Net cash provided by financing activities	16,971	7,883
Net increase (decrease) in cash and cash equivalents	4,430	(24,083)
Cash and cash equivalents at beginning of period	612,740	707,274
Cash and cash equivalents at end of period	617,170	683,191
Cash paid during the year for:
Interest paid	4,054	3,668
Income taxes paid	6,524	6,150
Other non cash items:
Transfer of loans to other real estate owned	492	787
Increase in dividends payable	7	7
Change in unrealized (loss) gain on securities available for sale-gross of deferred taxes	(7,160)	1,179
Change in deferred tax effect on unrealized (loss) gain on securities available for sale	1,858	(472)
Amortization of net actuarial (gain) loss and prior service cost on pension and postretirement plans	(49)	(40)
Change in deferred tax effect of amortization of net actuarial (gain) loss and prior service cost on pension and postretirement plans	$ 13	$ 16