CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
OPERATING ACTIVITIES:
Net income	$ 27,748	$ 23,552
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization on investment securities, net	506	446
Accretion on loans, net	(2,422)	(5,618)
Depreciation of premises and equipment	4,965	4,753
Amortization of mortgaging servicing rights	1,057	996
Provision for loan and lease losses	3,322	1,500
Net gain on sale of mortgage loans held for sale	(3,189)	(1,894)
Origination of mortgage loans held for sale	(128,026)	(54,046)
Proceeds from sale of mortgage loans held for sale	129,077	53,556
Origination of other loans held for sale	(86,218)
Proceeds from sale of other loans held for sale	85,564
Net realized gain on sales, calls and impairment of securities	(88)
Net gain realized on sale of other real estate owned	(734)	(733)
Writedowns of other real estate owned	1,016	2,042
Net gain on sale of banking center	(28)
Deferred director compensation expense - Company Stock	171	145
Stock based compensation expense	311	366
Increase in cash surrender value of bank owned life insurance	(1,050)	(951)
Net change in other assets and liabilities:
Accrued interest receivable	(228)	(283)
Accrued interest payable	(95)	(310)
Other assets	(1,709)	1,750
Other liabilities	5,336	1,500
Net cash provided by operating activities	35,286	26,771
INVESTING ACTIVITIES:
Purchases of securities available for sale	(994,305)	(119,427)
Proceeds from calls, maturities and paydowns of securities available for sale	968,812	102,111
Proceeds from calls, maturities and paydowns of securities to be held to maturity	4,357	3,342
Net change in outstanding warehouse lines of credit	(74,117)	(123,008)
Purchase of loans, including premiums paid	(87,619)	(144,669)
Net change in other loans	(96,916)	(51,492)
Proceeds from redemption of Federal Home Loan Bank stock		134
Proceeds from sales of other real estate owned	7,880	8,991
Proceeds from sale of banking center	1,623
Net purchases of premises and equipment	(2,312)	(4,240)
Purchase of bank owned life insurance		(25,000)
Net cash used in investing activities	(272,597)	(353,258)
FINANCING ACTIVITIES:
Net change in deposits	309,648	68,979
Net change in securities sold under agreements to repurchase and other short-term borrowings	(46,484)	110,319
Payments of Federal Home Loan Bank advances	(208,000)	(108,000)
Proceeds from Federal Home Loan Bank advances	212,000	165,000
Repurchase of Common Stock	(477)	(347)
Net proceeds from Common Stock options exercised	244	443
Cash dividends paid	(11,767)	(11,088)
Net cash provided by financing activities	255,164	225,306
Net change in cash and cash equivalents	17,853	(101,181)
Cash and cash equivalents at beginning of period	72,878	170,863
Cash and cash equivalents at end of period	90,731	69,682
Cash paid during the period for:
Interest	14,181	15,060
Income taxes	12,219	13,703
SUPPLEMENTAL NONCASH DISCLOSURES:
Transfers from loans to real estate acquired in settlement of loans	2,713	6,466
Loans provided for sales of other real estate owned	$ 2,962	$ 1,331