CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 52,084	$ 46,367	$ 43,805
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	4,229	3,758	3,412
Provision for loan losses	1,150	0	0
(Gain) Loss on sale and write down of other real estate owned	17	(48)	(159)
Amortization of loan servicing rights	598	553	526
Loans originated for sale	(70,724)	(69,302)	(55,107)
Net gain on sales of loans	(2,047)	(1,650)	(1,202)
Proceeds from sale of loans	69,418	68,557	56,065
Net loss on sale of premises and equipment	160	7	24
Net (gain) loss on sales and calls of securities available for sale	(66)	(42)	224
Net securities amortization	2,860	4,464	5,420
Stock based compensation expense	4,210	2,535	2,803
Earnings on life insurance	(1,392)	(1,338)	(1,393)
Tax benefit of stock option exercises	(669)	(148)	(50)
Net change:
Interest receivable and other assets	(1,386)	(398)	(2,687)
Interest payable and other liabilities	3,757	2,466	2,700
Total adjustments	10,115	9,414	10,576
Net cash from operating activities	62,199	55,781	54,381
Cash flows from investing activities:
Proceeds from sale of securities available for sale	12,095	7,787	13,766
Proceeds from maturities, calls and principal paydowns of securities available for sale	69,343	74,679	57,970
Purchases of securities available for sale	(116,196)	(91,810)	(73,361)
Purchase of life insurance	(3,390)	(2,629)	(3,181)
Proceeds from loans sold to others	0	0	4,307
Net increase in total loans	(391,145)	(322,114)	(235,165)
Proceeds from sales of land, premises and equipment	28	701	232
Purchases of land, premises and equipment	(9,825)	(9,167)	(6,565)
Proceeds from redemption of Federal Home Loan Bank stock	0	1,745	1,319
Purchase of Federal Home Loan Bank Stock	(3,854)	0	0
Proceeds from sales of other real estate owned	136	963	1,426
Proceeds from life insurance	360	738	778
Net cash from investing activities	(442,448)	(339,107)	(238,474)
Cash flows from financing activities:
Net increase/(decrease) in total deposits	394,491	310,301	327,052
Net increase/(decrease) in short-term borrowings	90,423	(20,785)	(101,469)
Payments on long-term borrowings	(2)	(1)	(2)
Common dividends paid	(18,200)	(15,697)	(13,555)
Preferred dividends paid	(13)	(13)	(13)
Proceeds related to equity incentive plans	614	12	57
Purchase of treasury stock	(458)	(455)	(444)
Net cash from financing activities	466,855	273,362	211,626
Net change in cash and cash equivalents	86,606	(9,964)	27,533
Cash and cash equivalents at beginning of the year	80,674	90,638	63,105
Cash and cash equivalents at end of the year	167,280	80,674	90,638
Cash paid during the year for:
Interest	18,567	15,786	14,957
Income taxes	21,613	21,566	21,185
Supplemental non-cash disclosures:
Loans transferred to other real estate owned	105	853	1,101
Securities Purchase Not Settled	1,459	0	0
Property transferred to held for sale	$ 0	$ 0	$ 249