Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net income	$ 45,109	$ 37,565
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	4,914	5,089
Amortization of intangible assets	2,068	1,050
Provision for (benefit from) loan losses	1,777	(1,588)
Amortization of investment securities premium, net	1,953	2,431
Gain on sale of investment securities	(207)	(961)
Originations of loans for resale	(63,912)	(83,907)
Proceeds from sale of loans originated for resale	66,138	85,846
Gain on sale of loans	(1,831)	(2,293)
Change in market value of mortgage servicing rights	(38)	795
Provision for losses on foreclosed assets	89	162
Gain on sale of foreclosed assets	(390)	(308)
Loss on disposal of fixed assets	206	61
Gain on sale of premises held for sale		(3)
Increase in cash value of life insurance	(1,996)	(2,043)
Life insurance proceeds in excess of cash value		(108)
Loss on marketable equity securities	92
Equity compensation vesting expense	1,094	1,184
Change in:
Reserve for unfunded commitments	(864)	270
Interest receivable	(5,820)	(629)
Interest payable	799	49
Other assets and liabilities, net	10,724	3,155
Net cash from operating activities	59,905	45,817
Investing activities:
Cash acquired in acquisition, net of consideration paid	30,613
Proceeds from maturities of securities available for sale	54,510	20,889
Proceeds from maturities of securities held to maturity	54,203	64,969
Proceeds from sale of available for sale securities	293,279	25,757
Purchases of securities available for sale	(370,843)	(195,465)
Net redemption of restricted equity securities	7,429
Loan origination and principal collections, net	(178,596)	(174,914)
Proceeds from sale of foreclosed assets	2,206	1,787
Proceeds from sale of premises held for sale		3,338
Proceeds from sale of premises and equipment	62
Purchases of premises and equipment	(5,736)	(10,874)
Life insurance proceeds		649
Net cash from investing activities	(112,873)	(263,864)
Financing activities:
Net change in deposits	92,051	31,896
Net change in other borrowings	(4,335)	81,237
Repurchase of common stock	(834)	(1,629)
Dividends paid	(12,984)	(11,228)
Exercise of stock options	185	193
Net cash from financing activities	74,083	100,469
Net change in cash and cash equivalents	21,115	(117,578)
Cash and cash equivalents at beginning of year	205,428	305,612
Cash and cash equivalents at end of year	226,543	188,034
Supplemental disclosure of noncash activities:
Unrealized (loss) gain on securities available for sale	(29,704)	5,411
Loans transferred to foreclosed assets	511	726
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	1,124	3,854
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	8,010	4,881
Cash paid for income taxes	11,625	$ 15,450
Assets acquired in acquisition plus goodwill recognized, net	1,456,505
Liabilities assumed in acquisition	$ 1,172,068