Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Operating activities:
Net income	$ 13,404	$ 10,791
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	735	900	$ 2,550
Depreciation, amortization and accretion, net	1,326	2,280
Deferred income tax provision	488	25
Gain on sales of mortgage loans held for sale	(314)	(406)
Origination of mortgage loans held for sale	(18,245)	(20,839)
Proceeds from sale of mortgage loans held for sale	17,284	20,574
Bank owned life insurance income	(187)	(204)
(Gain) on the disposal of premises and equipment	(6)
(Gain) on the sale of foreclosed assets	(109)
Stock compensation expense	823	660
Excess tax benefits from share-based compensation arrangements	(316)	(1,013)
Decrease (increase) in accrued interest receivable and other assets	25	(1,125)
(Decrease) Increase in accrued interest payable and other liabilities	(3,978)	3,947
Net cash provided by operating activities	10,930	15,590
Investing activities:
Purchases of securities available for sale	(199,946)	(99,988)
Proceeds from maturities of securities available for sale	171,308	114,297
Purchase of Federal Home Loan Bank stock	(1,230)
Net (increase) decrease in loans	(104,505)	32,171
Purchases of premises and equipment	(1,111)	(308)
Proceeds from disposal of premises and equipment	215
Proceeds from sale of foreclosed assets	2,658	1,043
Net cash (used in) provided by investing activities	(132,611)	47,215
Financing activities:
Net (decrease) increase in deposits	(4,931)	23,707
Net increase (decrease) in securities sold under agreements to repurchase and federal funds purchased	51,300	(38,293)
Proceeds from Federal Home Loan Bank advances	30,000	30,000
Repayments of Federal Home Loan Bank advances	(30,318)	(30,320)
Repurchase common stock for performing stock units	(156)	(216)
Common stock repurchases of restricted shares surrendered for taxes	(1,379)	(1,889)
Cash dividends paid	(5,207)	(4,286)
Net cash provided by (used in) financing activities	39,309	(21,297)
Net increase (decrease) in cash and cash equivalents	(82,372)	41,508
Cash and cash equivalents at beginning of period	139,248	47,973	47,973
Cash and cash equivalents at end of period	56,876	89,481	$ 139,248
Supplemental cash flow information:
Income tax payments
Cash paid for interest	2,383	1,437
Supplemental non-cash activity:
Transfers from loans to foreclosed assets	$ 270

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