CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 8,490	$ 5,119
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,533	1,125
Depreciation on premises and equipment	1,116	1,267
Amortization of intangible assets	525	580
Amortization of restricted stock awards	189	124
Compensation expense for stock option grants	132	106
Increase in cash surrender value of life insurance	(580)	(444)
Investment securities amortization, net	296	252
Other-than-temporary impairment on investment securities		824
Gain on sales of investment securities, net	(67)	(204)
Gain on sales of other real estate owned	(36)	4
Write-down of other real estate owned	171
Origination of loans held for sale	(221,782)	(249,146)
Proceeds from sales of loans held for sale	257,560	205,548
Gain on loans sold and held for sale	(8,627)	(8,885)
Amortization of mortgage servicing rights	1,374	1,281
Impairment (recapture) of mortgage servicing rights	76	2,245
Net change in operating assets and liabilities:
Accrued interest receivable	439	311
Accrued interest payable	940	882
Accrued income taxes receivable / payable	2,934	2,443
Other assets	5,378	(2,071)
Other liabilities	(2,390)	(9,275)
Net cash provided by operating activities	47,671	(47,914)
Investment securities available for sale:
Purchases	(113,222)	(24,882)
Sales	3,058	23,848
Maturities and payments	97,709	8,347
Investment securities held to maturity:
Purchases	(2,486)	(1,980)
Maturities	4,790	1,293
Net increase in loans	(136,525)	(24,061)
Purchases of premises and equipment	(1,319)	(555)
Purchases of nonmarketable equity securities	(4,156)
Sales of nonmarketable equity securities	3,594	90
Proceeds from sales of other real estate owned	540	1,539
Net cash (paid) acquired in acquisitions	12
Net cash (used in) provided by investing activities	(148,005)	(16,361)
Cash flows from financing activities:
Net increase in deposits	123,110	22,062
Net increase (decrease) in short-term borrowings	(7,522)	(5,889)
Proceeds from FHLB borrowings	142,357	300,000
Payments made on FHLB borrowings	(129,857)	(300,000)
Cash dividends paid on common stock	(3,129)	(2,137)
Proceeds from issuance of common stock under employee benefit plans	2,755	180
Net cash provided by (used in) financing activities	127,714	14,216
Net (decrease) increase in cash and cash equivalents	27,380	(50,059)
Cash and cash equivalents:
Beginning of year	190,716	212,475
End of year	218,096	162,416
Cash payments for:
Interest paid on deposits and borrowed funds	3,438	3,044
Income tax paid	5	157
Supplemental disclosures of noncash investing and financing activities:
Transfer of loans to other real estate owned	$ 961	$ 1,074