CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
OPERATING ACTIVITIES
Net Income	$ 105,334	$ 72,968	$ 71,392
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	14,995	13,883	17,965
(Recovery) provision for unfunded loan commitments	(54)	(410)	65
Net depreciation, amortization and accretion	4,599	2,498	3,628
Net amortization of discounts and premiums on securities	3,180	4,003	3,829
Stock-based compensation expense	1,891	3,008	2,544
Gain on sale of securities	0	(3,000)	0
Gain on sale of bank branch	0	(1,042)	0
Net gain on sale of credit card portfolio	0	0	(2,066)
Pension plan curtailment gain	0	0	(1,017)
Mortgage loans originated for sale	(90,142)	(93,382)	(106,020)
Proceeds from the sale of loans	93,793	93,991	108,209
Deferred income taxes	3,509	13,832	536
(Gain) loss on sale of fixed assets	(81)	128	0
Gain on the sale of mortgage loans, net	(1,537)	(1,551)	(1,621)
Gain on the sale of majority interest of insurance business	(1,873)	0	0
Pension contribution	(20,420)	0	0
Net increase in interest receivable	(1,635)	(2,714)	(2,409)
Net increase in interest payable	2,353	1,349	1,715
Net decrease in other assets	9,948	5,634	4,668
Net increase (decrease) in other liabilities	4,157	5,041	(4,613)
Net Cash Provided by Operating Activities	128,017	114,236	96,805
INVESTING ACTIVITIES
Proceeds from maturities, prepayments and calls of securities	89,833	80,956	74,110
Proceeds from sales of securities	0	65,801	0
Purchases of securities	(92,597)	(156,839)	(113,362)
Net (purchases) sales of Federal Home Loan Bank stock	(165)	2,547	(8,784)
Net increase in loans	(207,233)	(211,766)	(599,341)
Proceeds from the sale of loans not originated for resale	7,695	6,754	9,208
Purchases of premises and equipment	(4,172)	(4,694)	(3,560)
Proceeds from the sale of premises and equipment	135	422	57
Net Cash Used in Investing Activities	(201,964)	(212,415)	(616,653)
FINANCING ACTIVITIES
Net increase in core deposits	231,756	166,054	378,323
Net increase in certificates of deposit	14,397	27,132	18,095
Net (decrease) increase in short-term borrowings	(70,000)	(120,000)	304,000
Net decrease in securities sold under repurchase agreements	(31,778)	(671)	(11,254)
Proceeds from long-term borrowings	25,000	35,000	0
Repayments of long-term borrowings	(1,987)	(2,412)	(102,330)
Treasury shares issued-net	657	689	115
Repurchase common stock	(12,256)	0	0
Cash dividends paid to common shareholders	(34,539)	(28,569)	(26,784)
Repurchase warrant	(7,652)	0	0
Net Cash Provided by Financing Activities	112,284	75,845	559,935
Net increase (decrease) in cash and cash equivalents	38,337	(22,334)	40,087
Cash and cash equivalents at beginning of year	117,152	139,486	99,399
Cash and Cash Equivalents at End of Year	155,489	117,152	139,486
Supplemental Disclosures
Transfers to other real estate owned and other repossessed assets	870	2,238	1,039
Interest paid	53,035	33,591	22,800
Income taxes paid, net of refunds	15,728	33,814	26,743
Loans transferred to held for sale	0	0	250
Loans transferred to portfolio from held for sale	7,695	250	7,933
Transfer retained assets from sale to investment in insurance company partnership	1,917	0	0
Decrease in cash and cash equivalents from sale of bank branch	0	154	0
Investment commitment payable for an available for sale security	0	5,884	0
Branch
INVESTING ACTIVITIES
Proceeds from the divestiture of businesses	0	4,404	0
Credit Card Portfolio
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on the sale of majority interest of insurance business	0	0	(2,066)
INVESTING ACTIVITIES
Proceeds from the divestiture of businesses	0	0	25,019
Majority Interest of Insurance Business
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on the sale of majority interest of insurance business	(1,873)	0	0
INVESTING ACTIVITIES
Proceeds from the divestiture of businesses	$ 4,540	$ 0	$ 0