Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities:
Net income	$ 13,910	$ 12,079
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	1,613	1,604
Amortization of intangible assets	339	359
Reversal of provision for loan losses	(236)	(1,557)
Amortization of investment securities premium, net	700	798
Originations of loans for resale	(20,332)	(34,317)
Proceeds from sale of loans originated for resale	23,270	36,771
Gain on sale of loans	(626)	(910)
Change in market value of mortgage servicing rights	(111)	13
Provision for (reversal of) losses on foreclosed assets	90	(66)
Gain on sale of foreclosed assets	(371)	(118)
Loss on disposal of fixed assets	13
Gain on sale of premises held for sale		(3)
Increase in cash value of life insurance	(608)	(685)
Gain on life insurance death benefit		(107)
Equity compensation vesting expense	391	381
Loss on marketable equity securities	48
Change in:
Reserve for unfunded commitments	700	15
Interest receivable	1,365	791
Interest payable	28	(48)
Other assets and liabilities, net	3,531	4,444
Net cash from operating activities	23,714	19,444
Investing activities:
Proceeds from maturities of securities available for sale	15,643	14,069
Proceeds from maturities of securities held to maturity	18,535	22,074
Purchases of securities available for sale	(39,647)	(35,241)
Loan origination and principal collections, net	(54,682)	(1,613)
Proceeds from sale of other real estate owned	1,943	726
Proceeds from sale of premises held for sale		3,338
Purchases of premises and equipment	(2,200)	(2,413)
Life insurance proceeds		282
Net cash provided by investing activities	(60,408)	1,222
Financing activities:
Net increase in deposits	75,273	3,324
Net change in other borrowings	(57,125)	(2,296)
Repurchase of common stock		(169)
Dividends paid	(3,903)	(3,431)
Net cash used by financing activities	14,245	(2,572)
Net change in cash and cash equivalents	(22,449)	18,094
Cash and cash equivalents and beginning of year	205,428	305,612
Cash and cash equivalents at end of year	182,979	323,706
Supplemental disclosure of noncash activities:
Unrealized (loss) gain on securities available for sale	(15,628)	787
Loans transferred to foreclosed assets		85
Deferred gain on sale of premises held for sale		438
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	4	604
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	2,107	1,539
Cash paid for income taxes	$ 0	$ 0