Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Operating Activities:
Net Income	$ 13,738	$ 12,000	$ 41,392	$ 32,491
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	0	2,500	200	3,333	$ 5,533
Depreciation and Amortization			2,071	1,751
Net Amortization of Investment Security Premiums & Discounts			365	768
Amortization of Core Deposit Intangible			479	81
Accretion of Discount on Acquired Loans			(22)	(115)
Net (Gain) Loss on Sale of Investment Securities	(1)	0	(1)	1,330
Net Loss (Gain) on Sale of Property & Equipment			83	(295)
Earnings from Equity Investment			0	(381)
Dividends from Equity Investment			0	63
Net Change in Operating Assets & Liabilities:
Net Decrease in Interest Receivable and Other Assets			814	2,083
Net Increase in Interest Payable and Other Liabilities			8,789	3,441
Net Cash Provided by Operating Activities			54,170	44,550
Investing Activities:
Purchase of Investment Securities Available-for-Sale			(502,221)	(274,440)
Proceeds from Sold, Matured or Called Securities Available-for-Sale			511,590	342,208
Purchase of Investment Securities Held-to-Maturity			(14,271)	(3,042)
Proceeds from Matured or Called Securities Held-to-Maturity			8,658	5,998
Net Loans & Leases Paid, Originated or Acquired			(46,513)	(201,914)
Principal Collected on Loans & Leases Previously Charged Off			142	115
Additions to Premises and Equipment			(1,100)	(3,654)
Purchase of Other Investments			(3,015)	(4,053)
Proceeds from Sale of Property & Equipment			41	986
Net Cash Used in Investing Activities			(46,689)	(137,796)
Financing Activities:
Net Increase in Deposits			76,581	53,695
Common Stock Repurchases			0	(31,152)
Cash Dividends			(5,550)	(5,665)
Net Cash Provided by Financing Activities			71,031	16,878
Increase (Decrease) in Cash and Cash Equivalents			78,512	(76,368)
Cash and Cash Equivalents at Beginning of Period			145,564	187,149	187,149
Cash and Cash Equivalents at End of Period	$ 224,076	$ 110,781	224,076	110,781	$ 145,564
Supplementary Data
Cash Payments Made for Income Taxes			4,782	5,421
Issuance of Common Stock to the Bank's Non-Qualified Retirement Plans			2,564	10,502
Interest Paid			8,584	5,248
Supplementary Noncash Disclosure
Security (purchases) sales settled in subsequent period			$ 0	$ (55,000)