CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities
Net income	$ 32,843	$ 26,579
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	700	855
Depreciation expense	6,129	5,390
Amortization of mortgage servicing rights	1,012	1,068
(Recovery)/additional impairment of valuation allowance on mortgage servicing rights	(25)	175
Securities amortization, net	3,185	3,792
Amortization of purchased intangible assets	1,399	999
Earnings on cash surrender value of life insurance policies	(1,324)	(1,056)
Prepayment penalty on FHLB advance	214
Securities gains, net	(13)	(144)
Gain on loans sold	(4,912)	(4,512)
Loans originated for sale	(175,769)	(185,098)
Proceeds from loan sales	184,172	190,166
Gain on life insurance benefit	(256)
Stock based compensation expense	777	713
Stock portion of director retainer fee expense	241	282
(Gain)/Loss on sale and write-down of OREO	226	253
Excess tax benefit related to stock based compensation	(402)
Change in other assets and liabilities	2,845	(7,520)
Net cash provided by operating activities	50,590	31,436
Investing Activities
Net change in short term investments	(200)
Purchases of securities available for sale	(176,875)	(186,209)
Proceeds from calls, maturities, and payments on securities available for sale	91,313	100,835
Proceeds from sales of securities available for sale	56,441	85,738
Loan originations and payments, net	30,059	(73,574)
Purchases of premises and equipment	(4,760)	(12,179)
Proceeds from sale of OREO	2,230	3,185
Proceeds from redemption of FHLB stock	2,307	3,090
Purchase of FHLB stock	(5,168)	(4,676)
Proceeds from life insurance benefit	511
Cash received/(paid) from business acquisitions, net	2,845	(11,289)
Net cash used by investing activities	(1,297)	(95,079)
Financing Activities
Net change in deposits	(55,755)	28,558
Net change in other borrowings	(10,271)	59,713
Proceeds from FHLB advances	132,000	420,000
Repayment of FHLB advances	(114,694)	(442,006)
Proceeds from term debt		30,000
Cash dividends on common stock	(12,557)	(10,445)
Purchase of treasury shares	(380)	(333)
Repayment on term debt	(5,000)	(10,000)
Proceeds from exercise of stock options	1,089	907
Net cash provided by financing activities	(65,568)	76,394
Net change in cash and cash equivalents	(16,275)	12,751
Cash and cash equivalents, beginning of year	86,552	67,578
Cash and cash equivalents, end of period	70,277	80,329
Supplemental cash flow information
Interest paid	11,497	8,330
Income taxes paid	7,300	3,005
Supplemental non cash disclosure
Loan balances transferred to foreclosed real estate	$ 1,470	$ 1,547