Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 11,824,000	$ 10,881,000
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization	2,178,000	2,483,000
Accretion of acquired loans	(146,000)	(357,000)
Provision for loan losses	850,000	0
Stock-based compensation expense	744,000	597,000
Proceeds from sales of mortgage loans held for sale	21,609,000	21,010,000
Origination of mortgage loans held for sale	(21,592,000)	(19,585,000)
Net gain from sales of mortgage loans held for sale	(705,000)	(736,000)
Net gain from sales and valuation write-downs of foreclosed assets	(27,000)	(105,000)
Net (gain) loss from sales and valuation write-downs of former bank premises	(558,000)	99,000
Net loss from sales and write-downs of fixed assets	0	53,000
Earnings on bank owned life insurance	(1,630,000)	(331,000)
Net change in:
Accrued interest receivable	(1,464,000)	(820,000)
Other assets	1,147,000	(866,000)
Accrued interest and other liabilities	(9,785,000)	722,000
Net cash from operating activities	2,445,000	13,045,000
Cash flows from investing activities
Loan originations and payments, net	(45,840,000)	7,257,000
Purchases of securities available for sale	(2,415,000)	(13,303,000)
Proceeds from maturities, calls and repayments of securities available for sale	6,162,000	4,609,000
Purchases of Federal Home Loan Bank stock	(1,980,000)	0
Proceeds from sales of foreclosed assets	171,000	410,000
Proceeds from sales of former bank premises	854,000	0
Proceeds from bank owned life insurance cash value release and death benefits	3,996,000	0
Purchases of bank owned life insurance	(2,500,000)	0
Net purchases of premises and equipment	(2,732,000)	(1,429,000)
Net cash for investing activities	(44,284,000)	(2,456,000)
Cash flows from financing activities
Net increase (decrease) in time deposits	165,532,000	(8,412,000)
Net increase (decrease) in all other deposits	(18,266,000)	26,100,000
Net increase (decrease) in securities sold under agreements to repurchase	7,716,000	(13,854,000)
Maturities of Federal Home Loan Bank advances	(10,000,000)	0
Proceeds from Federal Home Loan Bank advances	44,000,000	0
Proceeds from stock option exercises	2,000	54,000
Employee stock purchase plan	14,000	14,000
Dividend reinvestment plan	182,000	164,000
Repurchases of common stock	(3,601,000)	0
Payment of cash dividends to common shareholders	(4,200,000)	(3,599,000)
Net cash from financing activities	181,379,000	467,000
Net change in cash and cash equivalents	139,540,000	11,056,000
Cash and cash equivalents at beginning of period	75,354,000	200,101,000
Cash and cash equivalents at end of period	214,894,000	211,157,000
Supplemental disclosures of cash flows information
Interest	6,518,000	4,529,000
Federal income tax	0	0
Transfers from loans to foreclosed assets	25,000	232,000
Transfers from bank premises to other real estate owned	$ 0	$ 296,000