Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 29,225	$ 30,213
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,982	1,946
Amortization of right-of-use asset	2,941	0
Net gain on sale of other real estate owned	(465)	(220)
Writedown of other real estate owned	276	230
(Recoveries) provision for loan losses	(41)	600
Deferred tax expense	660	70
Net amortization of securities	1,313	1,725
Stock based compensation expense	(6)	77
Net gain on sale of bank premises and equipment	(2)	0
Decrease in taxes receivable	1,038	1,311
(Increase) Decrease in interest receivable	(996)	112
Increase in interest payable	528	158
Increase in other assets	(1,647)	(1,439)
Decrease in operating lease liabilities	(2,983)	0
Decrease in accrued expenses and other liabilities	(1,469)	(1,784)
Total adjustments	1,129	2,786
Net cash provided by operating activities	30,354	32,999
Cash flows from investing activities:
Proceeds from sales and calls of securities available for sale	44,450	49,481
Proceeds from calls and maturities of held to maturity securities	1,754	2,821
Purchases of securities available for sale	(176,045)	(60,088)
Proceeds from maturities of securities available for sale	10,052	45,000
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock	(230)	(174)
Net increase in loans	(35,385)	(106,869)
Proceeds from dispositions of other real estate owned	1,951	2,521
Proceeds from dispositions of bank premises and equipment	2	0
Purchases of bank premises and equipment	(1,346)	(2,310)
Net cash used in investing activities	(154,797)	(69,618)
Cash flows from financing activities:
Net increase in deposits	188,020	81,944
Net increase (decrease) in short-term borrowings	4,853	(60,286)
Proceeds from exercise of stock options	35	703
Stock based award tax withholding payments	0	(37)
Proceeds from sale of treasury stock	1,194	1,190
Purchases of treasury stock	(35)	(379)
Dividends paid	(13,178)	(12,640)
Net cash provided by financing activities	180,889	10,495
Net increase in cash and cash equivalents	56,446	(26,124)
Cash and cash equivalents at beginning of period	503,709	612,740
Cash and cash equivalents at end of period	560,155	586,616
Cash paid during the year for:
Interest paid	16,626	4,549
Income taxes paid	8,332	6,524
Other non cash items
Transfer of loans to other real estate owned	2,712	1,854
Increase in dividends payable	11	13
Change in unrealized gain (loss) on securities available for sale-gross of deferred taxes	11,767	(8,830)
Change in deferred tax effect on unrealized (gain) loss on securities available for sale	(3,058)	2,284
Amortization of net actuarial gain and prior service cost on pension and postretirement plans	(235)	(133)
Change in deferred tax effect of amortization of net actuarial gain postretirement benefit plans	$ 61	$ 35