Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income	$ 20,079	$ 19,702
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	3,245	3,090
Amortization of intangible assets	658	578
Benefit from reversal of provision for loan losses	(564)	(436)
Amortization of investment securities premium, net	2,334	1,645
Originations of loans for resale	(58,952)	(55,669)
Proceeds from sale of loans originated for resale	59,009	55,656
Gain on sale of loans	(1,692)	(1,459)
Change in market value of mortgage servicing rights	1,399	(15)
Provision for losses on foreclosed assets	32	241
Gain on sale of foreclosed assets	(149)	(426)
Loss on disposal of fixed assets	39	83
Increase in cash value of life insurance	(1,377)	(1,350)
Life insurance proceeds in excess of cash value	(238)
Equity compensation vesting expense	697	698
Tax effect of equity compensation exercise or release	182	(30)
Change in:
Reserve for unfunded commitments	408	(20)
Interest receivable	(816)	(789)
Interest payable	(47)	(181)
Other assets and liabilities, net	(629)	4,249
Net cash from operating activities	23,618	25,567
Investing activities:
Proceeds from maturities of securities available for sale	26,359	13,941
Proceeds from maturities of securities held to maturity	50,963	45,078
Purchases of securities available for sale	(155,444)	(220,383)
Purchases of securities held to maturity		(146,100)
Loan origination and principal collections, net	(135,638)	(112,372)
Loans purchased	(22,503)
Proceeds from sale of loans other than loans originated for sale	27,049
Improvement of foreclosed assets		(511)
Proceeds from sale of other real estate owned	2,497	1,033
Proceeds from sale of premises and equipment	1	2
Purchases of premises and equipment	(9,053)	(1,293)
Cash acquired in acquisition	156,316
Net cash used by investing activities	(59,453)	(420,605)
Financing activities:
Net decrease in deposits	(51,101)	(38,741)
Net change in other borrowings	7,136	(2,541)
Tax effect of equity compensation exercise or release	(182)	30
Repurchase of common stock	(335)	(31)
Dividends paid	(6,841)	(5,473)
Exercise of stock options	483	569
Net cash used by financing activities	(50,840)	(46,187)
Net change in cash and cash equivalents	(86,675)	(441,225)
Cash and cash equivalents and beginning of year	303,461	610,728
Cash and cash equivalents at end of period	216,786	169,503
Supplemental disclosure of noncash activities:
Unrealized gain (loss) on securities available for sale	13,298	(4,737)
Loans transferred to foreclosed assets	853	1,649
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	2,331	667
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	2,869	2,909
Cash paid for income taxes	12,540	$ 7,395
Assets acquired in acquisition	161,231
Liabilities assumed in acquisition	$ 161,231