Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 4,780,000	$ 3,195,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan losses	886,000	678,000
Accretion of discounts on acquired loans and deferred fees	(559,000)	(171,000)
Depreciation and amortization	737,000	104,000
Net amortization of premiums on investment securities	205,000	289,000
Securities (gains) losses, net	(12,000)
Mortgage banking income	$ (1,385,000)	$ (1,313,000)
Type of Revenue [Extensible List]	us-gaap:MortgageBankingMember	us-gaap:MortgageBankingMember
Tri-Net fees	$ (641,000)	$ (528,000)
Stock-based compensation	344,000	305,000
Deferred income tax expense	395,000	255,000
Origination of loans held for sale	(130,697,000)	(123,853,000)
Proceeds from loans held for sale	117,471,000	137,501,000
Net increase in accrued interest receivable and other assets	(13,438,000)	(691,000)
Net increase (decrease) in accrued interest payable and other liabilities	7,718,000	(444,000)
Net cash provided by (used in) operating activities	(14,196,000)	15,327,000
Activities in securities available-for-sale:
Purchases	(2,138,000)	(8,639,000)
Sales	9,722,000	2,014,000
Maturities, prepayments and calls	5,599,000	5,044,000
Purchase of restricted equity securities	(2,107,000)	(3,000)
Net increase in loans	(37,523,000)	(83,949,000)
Purchase of premises and equipment	(1,109,000)	(66,000)
Net cash used in investing activities	(27,556,000)	(85,599,000)
Cash flows from financing activities:
Net increase in deposits	108,794,000	7,687,000
Proceeds from Federal Home Loan Bank advances	65,000,000	30,000,000
Payments on Federal Home Loan Bank advances	(115,000,000)
Repurchase of common stock	(2,431,000)
Exercise of common stock options and warrants, net of repurchase of restricted shares	1,012,000	913,000
Common and preferred stock dividends paid	(745,000)
Net cash provided by financing activities	56,630,000	38,600,000
Net increase (decrease) in cash and cash equivalents	14,878,000	(31,672,000)
Cash and cash equivalents at beginning of period	105,443,000	82,797,000
Cash and cash equivalents at end of period	120,321,000	51,125,000
Supplemental disclosures of cash paid:
Interest paid	6,034,000	2,888,000
Income taxes	356,000	264,000
Cash paid for operating lease liabilities	459,000	394,000
Supplemental disclosures of noncash transactions:
Transfer of loans to other real estate	50,000
Loans charged off to the allowance for loan losses	$ 82,000	$ 160,000