Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 20,875	$ 21,442
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,071	2,331
Net gain on sale of other real estate owned	(363)	(302)
Writedown of other real estate owned	606	350
Provision for loan losses	1,600	1,600
Deferred tax expense	1,211	167
Net amortization of securities	2,453	2,912
Stock based compensation expense	112	96
Net gain on sale of bank premises and equipment	(62)	0
Net gain on sales and calls of securities	(668)	(249)
Decrease in taxes receivable	1,996	1,815
Increase in interest receivable	(442)	(7)
Increase (decrease) in interest payable	17	(33)
Increase in other assets	(1,530)	(405)
(Decrease) increase in accrued expenses and other liabilities	(631)	1,072
Total adjustments	6,370	9,347
Net cash provided by operating activities	27,245	30,789
Cash flows from investing activities:
Proceeds from sales and calls of securities available for sale	134,550	78,604
Proceeds from calls and maturities of held to maturity securities	5,781	7,403
Purchases of securities available for sale	(144,422)	(98,092)
Proceeds from maturities of securities available for sale	550	1,499
Purchases of Federal Reserve Bank and Federal Home Loan Bank stock	(99)	(252)
Net increase in loans	(54,636)	(90,557)
Proceeds from dispositions of other real estate owned	4,058	3,870
Proceeds from dispositions of bank premises and equipment	58	66
Purchases of bank premises and equipment	(1,217)	(1,932)
Net cash used in investing activities	(55,377)	(99,391)
Cash flows from financing activities:
Net increase in deposits	80,249	105,200
Net decrease in short-term borrowings	(684)	(18,366)
Proceeds from exercise of stock options and related tax benefits	502	99
Proceeds from sale of treasury stock	1,307	1,361
Purchases of treasury stock	(489)	(99)
Dividends paid	(12,513)	(12,456)
Net cash provided by financing activities	68,372	75,739
Net increase in cash and cash equivalents	40,240	7,137
Cash and cash equivalents at beginning of period	718,156	671,448
Cash and cash equivalents at end of period	758,396	678,585
Cash paid during the year for:
Interest paid	7,735	8,250
Income taxes paid	10,485	11,059
Other non cash items:
Transfer of loans to other real estate owned	2,448	3,585
Increase in dividends payable	15	10
Change in unrealized gain on securities available for sale-gross of deferred taxes	11,932	(2,422)
Change in deferred tax effect on unrealized gain on securities available for sale	(4,773)	971
Amortization of net actuarial loss and prior service credit on pension and postretirement plans	28	55
Change in deferred tax effect of amortization of net actuarial loss and prior service credit	$ (11)	$ (22)