Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Operating Activities:
Net Income	$ 14,309	$ 14,105	$ 28,431	$ 27,654
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	300	200	300	200	$ 200
Depreciation and Amortization			1,414	1,387
Net Amortization of Investment Security Premiums & Discounts			397	222
Amortization of Core Deposit Intangible			313	319
Accretion of Discount on Acquired Loans			(117)	(6)
Net Gain on Sale of Investment Securities	0	0	(13)	0
Net Gain on Sale of Property & Equipment			(62)	0
Net Change in Operating Assets & Liabilities:
Net Decrease in Interest Receivable and Other Assets			1,953	810
Net (Decrease) Increase in Interest Payable and Other Liabilities			(3,217)	4,175
Net Cash Provided by Operating Activities			29,399	34,761
Investing Activities:
Purchase of Investment Securities Available-for-Sale			(150,342)	(316,054)
Proceeds from Sold, Matured or Called Securities Available-for-Sale			106,840	330,902
Purchase of Investment Securities Held-to-Maturity			(15,068)	(11,606)
Proceeds from Matured or Called Securities Held-to-Maturity			6,243	4,823
Net Loans & Leases Paid, Originated or Acquired			(391,830)	(28,069)
Principal Collected on Loans & Leases Previously Charged Off			208	77
Additions to Premises and Equipment, Net			(3,877)	(628)
Purchase of Other Investments			(3,230)	(1,947)
Proceeds from Sale of Property & Equipment			77	0
Net Cash Used in Investing Activities			(450,979)	(22,502)
Financing Activities:
Net Increase (Decrease) in Deposits			504,014	(37,556)
Cash Dividends			(5,753)	(5,550)
Net Cash Provided by (Used in) Financing Activities			498,261	(43,106)
Net Change in Cash and Cash Equivalents			76,681	(30,847)
Cash and Cash Equivalents at Beginning of Period			294,758	145,564	145,564
Cash and Cash Equivalents at End of Period	$ 371,439	$ 114,717	371,439	114,717	$ 294,758
Supplementary Data
Cash Payments Made for Income Taxes			17	4,631
Issuance of Common Stock to the Bank's Non-Qualified Retirement Plans			403	2,564
Interest Paid			6,427	5,109
Supplementary Noncash Disclosure
Lease Liabilities Arising from Obtaining Right-of-Use Assets			0	5,645
Security (purchases) sales settled in subsequent period			$ (2,507)	$ 0