Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities:
Net income	$ 32,278	$ 32,396
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	4,870	4,487
Amortization of intangible assets	1,017	867
Benefit from reversal of provision for loan losses	(4,537)	(1,302)
Amortization of investment securities premium, net	3,625	2,547
Originations of residential mortgage loans for resale	(101,206)	(82,499)
Proceeds from sale of residential mortgage loans originated for resale	97,056	82,448
Gain on sale of loans	(2,645)	(2,181)
Change in market value of mortgage servicing rights	2,198	570
Provision for losses on foreclosed assets	41	347
Gain on sale of foreclosed assets	(218)	(782)
Write down of fixed assets held for sale	716
Loss (gain) on disposal of fixed assets	52	125
Increase in cash value of life insurance	(2,086)	(2,121)
Life insurance proceeds in excess of cash value	(238)
Equity compensation vesting expense	1,078	1,051
Tax effect of equity compensation exercise or release	182	57
Change in:
Reserve for unfunded commitments	433	(60)
Interest receivable	(33)	(937)
Interest payable		(183)
Other assets and liabilities, net	6,301	9,534
Net cash from operating activities	38,884	44,364
Investing activities:
Proceeds from maturities of securities available for sale	47,722	24,386
Proceeds from maturities of securities held to maturity	83,665	69,771
Purchases of securities available for sale	(160,787)	(272,125)
Purchases of securities held to maturity		(146,100)
Loan origination and principal collections, net	(198,366)	(189,995)
Loans purchased	(22,503)
Proceeds from sale of loans other than loans originated for sale	32,029
Improvement of foreclosed assets		(522)
Proceeds from sale of other real estate owned	3,375	4,753
Proceeds from sale of premises and equipment	1,231	2
Purchases of premises and equipment	(10,048)	(2,817)
Cash acquired in acquisition	156,316
Net cash used by investing activities	(67,366)	(512,647)
Financing activities:
Net increase in deposits	43,515	77,449
Net change in other borrowings	6,907	(2,417)
Tax effect of equity compensation exercise or release	(182)	(57)
Repurchase of common stock	(384)	(54)
Dividends paid	(10,265)	(8,728)
Exercise of stock options	518	660
Net cash provided by financing activities	40,109	66,853
Net change in cash and cash equivalents	11,627	(401,430)
Cash and cash equivalents and beginning of year	303,461	610,728
Cash and cash equivalents at end of period	315,088	209,298
Supplemental disclosure of noncash activities:
Unrealized gain (loss) on securities available for sale	11,240	(740)
Loans transferred to foreclosed assets	1,953	4,187
Fixed assets transferred to held for sale	1,934
Market value of shares tendered in-lieu of cash to pay for exercise of options, release of RSUs, and/or related taxes	2,774	667
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	4,261	4,250
Cash paid for income taxes	15,515	$ 13,265
Assets acquired in acquisition	161,231
Liabilities assumed in acquisition	$ 161,231