Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Activities
Net Income	$ 56,036	$ 45,527	$ 28,370
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	200	5,533	2,850
Depreciation and Amortization	2,756	2,421	2,186
(Benefit) Provision for Deferred Income Taxes	(3,254)	5,462	12,605
Net Amortization of Investment Security Premium & Discounts	510	861	1,430
Amortization of Core Deposit Intangible	639	228	110
Accretion of Discount on Acquired Loans	(47)	(153)	(202)
Net (Gain) Loss on Investment Securities	(1)	1,260	(131)
Net Loss (Gain) on Sale of Property & Equipment	87	(273)	(1,189)
Net Gain on Sale of ORE	0	0	(414)
Earnings from Equity Investment	0	(66)	0
Dividends from Equity Investment	0	63	0
Gain on Remeasurement of Previously Held Equity Investment	0	(997)	0
Net Change in Operating Assets & Liabilities:
Net Decrease (Increase) in Interest Receivable and Other Assets	18,949	(2,098)	(275)
Net Increase (Decrease) in Interest Payable and Other Liabilities	4,983	6	(5,396)
Net Cash Provided by Operating Activities	80,858	57,774	39,944
Investing Activities
Purchase of Investment Securities Available-for-Sale	(652,280)	(465,414)	(325,573)
Proceeds from Sold, Matured, or Called Securities Available-for-Sale	644,244	550,727	289,857
Purchase of Investment Securities Held-to-Maturity	(16,376)	(9,813)	(1,205)
Proceeds from Matured, or Called Securities Held-to-Maturity	10,871	10,647	4,794
Net Loans & Leases Paid, Originated or Acquired	(102,413)	(276,066)	(38,178)
Principal Collected on Loans & Leases Previously Charged Off	220	158	259
Cash Paid for Acquisition, Net	0	(5,987)	0
Additions to Premises and Equipment	(15,537)	(4,577)	(4,254)
Purchase of Other Investment	(4,400)	(5,750)	(14,380)
Proceeds from Sale of Property & Equipment	41	986	3,304
Proceeds from Sale of ORE	0	0	3,186
Net Cash Used in Investing Activities	(135,630)	(205,089)	(82,190)
Financing Activities
Net Increase in Deposits	215,187	148,033	141,517
Stock Repurchases	0	(31,152)	0
Cash Dividends	(11,221)	(11,151)	(10,982)
Net Cash Provided by Financing Activities	203,966	105,730	130,535
Net Change in Cash and Cash Equivalents	149,194	(41,585)	88,289
Cash and Cash Equivalents at Beginning of Year	145,564	187,149	98,860
Cash and Cash Equivalents at End of Year	294,758	145,564	187,149
Supplementary Data
Cash Payments Made for Income Taxes	7,342	7,971	13,942
Issuance of Common Stock to the Bank's Non-Qualified Retirement Plans	6,973	10,502	2,953
Interest Paid	11,755	7,731	6,005
Supplementary Noncash Disclosure
Lease Liabilities Arising from Obtaining Right-of-Use Assets	5,645	0	0
Acquisitions:
Fair Value of Assets Acquired	0	234,456	0
Fair Value of Liabilities Acquired	$ 0	$ 192,809	$ 0