CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 45,925	$ 46,481	$ 43,465
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,600	5,650	1,050
Depreciation of premises and equipment	3,454	3,651	3,381
Net amortization of premium and discount	3,426	2,779	1,568
Amortization of intangibles	1,035	1,284	904
Goodwill impairment	150	0	0
Share–based compensation	2,577	2,190	2,074
Tax benefit from stock option exercises and other equity instruments	508	1,016	694
Deferred income tax expense	5,687	868	1,820
Income from bank-owned life insurance	(2,161)	(2,659)	(1,982)
Net gains on loan sales and commissions on loans originated for others	(10,991)	(13,137)	(9,826)
Net gain on sale of portfolio loans	0	(135)	0
Proceeds from sales of loans	472,556	551,788	477,616
Loans originated for sale	(461,262)	(532,950)	(462,663)
Change in fair value of contingent consideration	(643)	(898)	41
(Increase) decrease in other assets	(8,794)	984	(4,165)
Increase (decrease) in other liabilities	5,318	(7,163)	(1,717)
Net cash provided by operating activities	59,385	59,749	52,260
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale	(89,194)	(431,662)	(44,682)
Purchases of other investment securities available for sale	(59,940)	(121,679)	(88,784)
Maturities and principal payments of mortgage-backed securities available for sale	84,381	65,673	50,083
Maturities and principal payments of other investment securities available for sale	22,071	108,256	60,085
Maturities and principal payments of mortgage-backed securities held to maturity	2,950	4,193	4,960
Remittance (purchases) of Federal Home Loan Bank stock	2,612	(18,813)	13,414
Net increase in loans	(120,582)	(112,966)	(152,306)
Proceeds from sale of portfolio loans	0	510	0
Purchases of loans	(20,278)	(113,562)	(3,085)
Proceeds from the sale of property acquired through foreclosure or repossession	1,053	731	1,580
Purchases of premises and equipment	(2,779)	(3,112)	(5,479)
Purchases of bank-owned life insurance	0	(5,000)	0
Proceeds from Life Insurance Policy	0	2,054	0
Cash used in business combination, net of cash acquired	0	0	(1,671)
Net cash used in investing activities	(179,706)	(625,377)	(165,885)
Cash flows from financing activities:
Net increase in deposits	178,955	129,497	179,437
Proceeds from Federal Home Loan Bank advances	1,352,501	1,428,750	495,500
Repayment of Federal Home Loan Bank advances	(1,410,075)	(958,793)	(522,824)
Proceeds from stock option exercises and issuance of other equity instruments	366	977	1,563
Cash dividends paid	(26,300)	(24,637)	(22,770)
Net cash provided by financing activities	95,447	575,794	130,906
Net (decrease) increase in cash and cash equivalents	(24,874)	10,166	17,281
Cash and cash equivalents at beginning of year	107,797	97,631	80,350
Cash and cash equivalents at end of year	82,923	107,797	97,631
Noncash Investing and Financing Activities:
Loans charged off	2,462	7,012	2,305
Loans transferred to property acquired through foreclosure or repossession	576	1,075	1,206
In conjunction with a purchase acquisition, assets were acquired and liabilities were assumed as follows:
Common stock issued for acquisition	0	0	5,430
Fair value of assets acquired, net of cash acquired	0	0	14,315
Fair value of liabilities assumed	0	0	7,214
Supplemental Disclosures:
Interest payments	29,687	22,267	21,947
Income tax payments	$ 25,988	$ 19,822	$ 20,213