Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income	$ 32,396	$ 20,458
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	4,487	4,035
Amortization of intangible assets	867	157
Benefit from reversal of provision for loan losses	(1,302)	(2,624)
Amortization of investment securities premium, net	2,547	578
Originations of loans for resale	(82,499)	(49,241)
Proceeds from sale of loans originated for resale	82,448	49,834
Gain on sale of loans	(2,181)	(1,487)
Change in market value of mortgage servicing rights	570	620
Provision for losses on foreclosed assets	347	137
Gain on sale of foreclosed assets	(782)	(1,853)
Loss (gain) on disposal of fixed assets	125	(60)
Increase in cash value of life insurance	(2,121)	(1,287)
Equity compensation vesting expense	1,051	810
Equity compensation tax effect	57	(225)
Change in:
Reserve for unfunded commitments	(60)	(195)
Interest receivable	(937)	(346)
Interest payable	(183)	(185)
Other assets and liabilities, net	9,534	2,625
Net cash from operating activities	44,364	21,751
Investing activities:
Proceeds from maturities of securities available for sale	24,386	19,226
Proceeds from maturities of securities held to maturity	69,771	18,727
Purchases of securities available for sale	(272,125)	0
Purchases of securities held to maturity	(146,100)	(221,984)
(Purchase) redemption of restricted equity securities		(2,419)
Loan origination and principal collections, net	(189,995)	(64,023)
Loans purchased		(32,017)
Improvement of foreclosed assets	(522)	(461)
Proceeds from sale of other real estate owned	4,753	7,818
Proceeds from sale of premises and equipment	2	120
Purchases of premises and equipment	(2,817)	(3,857)
Net cash used by investing activities	(512,647)	(278,870)
Financing activities:
Net increase in deposits	77,449	26,873
Net change in other borrowings	(2,417)	6,330
Equity compensation tax effect	(57)	225
Repurchase of common stock	(54)	(292)
Dividends paid	(8,728)	(5,322)
Exercise of stock options	660	616
Net cash provided by financing activities	66,853	28,430
Net change in cash and cash equivalents	(401,430)	(228,689)
Cash and cash equivalents and beginning of year	610,728	598,368
Cash and cash equivalents at end of period	209,298	369,679
Supplemental disclosure of noncash activities:
Unrealized (loss) gain on securities available for sale	(740)	(133)
Loans transferred to foreclosed assets	4,187	4,475
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	667	2,259
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	4,250	3,429
Cash paid for income taxes	$ 13,265	$ 14,405