Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Cash Flows [Abstract]
Net cash from operating activities	$ 12,905	$ 6,613
Cash flows used for investing activities:
Maturities and calls of securities, available-for-sale	12,396	3,563
Purchases of securities, available-for-sale	(27,749)	(10,898)
Sale of securities available for sale	17,570	0
Redemption of other securities	741
Purchase of bank owned life insurance	(955)
Net loan repayments (originations)	(10,988)	10,743
Proceeds from sale of other real estate owned properties		6
Proceeds from sale of premises and equipment		1
Premises and equipment purchases	(216)	(105)
Net cash provided by (used for) investing activities	(9,201)	3,310
Cash flows from financing activities:
Repayment of long-term FHLB advances		(10,000)
Net change in short-term FHLB advances	(66,500)	(1,900)
Increase in deposits	185,908	85,748
Decrease in securities sold under repurchase agreements	(229)	(4,303)
Common dividends paid	(1,404)	(714)
Preferred dividends paid	(164)	(303)
Net cash provided by financing activities	117,611	68,528
Increase in cash and due from financial institutions	121,315	78,451
Cash and due from financial institutions at beginning of period	42,779	40,519
Cash and due from financial institutions at end of period	164,094	118,970
Cash paid during the period for:
Interest	2,834	1,462
Supplemental cash flow information:
Transfer of loans held for sale to portfolio		85
Conversion of preferred shares to common shares		324
Securities purchased not settled	1,061	$ 1,264
Increase in right-of-use asset on leases	(2,201)
Increase in lease liability	$ 2,201