Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 15,814	$ 11,277
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	965	1,021
Deferred taxes	163	122
Stock-based compensation	236	147
Provision for loan losses	946	1,229
Write-downs of other real estate owned and other repossessed assets	467	538
Gains on sale of mortgage loans held for sale	(279)	(256)
Securities losses	288	8
(Gains)/losses on sale of assets, net	(68)	11
Proceeds from sale of mortgage loans held for sale	12,811	11,133
Funding of mortgage loans held for sale	(12,644)	(12,232)
Amortization of securities premiums and discounts, net	1,132	800
Change in cash surrender value of bank owned life insurance	(1,580)	(354)
Mortgage servicing rights:
Fair value adjustments	(122)	42
New servicing assets created	(100)	(83)
Changes in:
Other assets	(28,246)	(2,045)
Other liabilities	(2,380)	3,197
Net cash provided (used in) by operating activities	(12,597)	14,555
Certificates of deposit in other banks:
Purchase of certificates of deposit	0	(8,820)
Maturity of certificates of deposit	1,715	235
Securities available-for-sale (AFS):
Purchase of AFS securities	(113,781)	(46,756)
Proceeds from the sales of AFS securities	50,327	0
Proceeds from prepayments and maturities of AFS securities	37,258	46,764
Securities held-to-maturity (HTM):
Proceeds from maturities of HTM securities	0	8
Change in loans, net	1,945	(33,746)
Purchase of premises and equipment	(507)	(487)
Proceeds from sale and retirement of premises and equipment	19	25
Proceeds from sale of other real estate and repossessed assets	457	427
Proceeds from settlement of bank owned life insurance	3,038	0
Net cash used in investing activities	(19,529)	(42,350)
Cash flows from financing activities:
Change in deposits, net	55,807	78,470
Change in repurchase agreements and federal funds purchased, net	774	12,970
Payments on advances from Federal Home Loan Bank	(23)	(25)
Issuance of common stock	596	367
Dividends paid	(5,834)	(5,662)
Net cash provided by financing activities	51,320	86,120
Net increase in cash and cash equivalents	19,194	58,325
Cash and cash equivalents at beginning of period	175,274	144,716
Cash and cash equivalents at end of period	194,468	203,041
Supplemental disclosures:
Income taxes paid	0	150
Interest paid	5,290	3,340
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets	432	53
Common stock dividends accrued, paid in subsequent quarter	207	209
Real estate acquired in settlement of loans	$ 1,284	$ 856