Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 40,979	$ 30,869
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,841	11,174
Provision for loan and lease losses	4,185	7,345
Net amortization of premium on securities	16,204	14,645
Securities gains, net	(8,148)	(7,463)
Stock based compensation	2,386	1,908
Write downs and losses on repossessed assets, net	574	924
Loans originated for sale	(546,050)	(724,081)
Proceeds on sales of loans held for sale	554,427	710,753
Net gains on sale of loans held for sale	(16,132)	(21,328)
Decrease in accrued interest receivable	1,651	1,478
Decrease in prepaid expenses	683	100
Decrease in accrued interest payable	(406)	(867)
Capitalization of servicing rights	(6,203)	(7,156)
Valuation adjustment on commercial servicing rights	46	0
Write downs and losses on sales of assets, net	(304)	938
Other, net	(8,316)	(10,275)
NET CASH PROVIDED BY OPERATING ACTIVITIES	50,417	8,964
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of securities available for sale	622,375	526,026
Proceeds from the sale of securities held to maturity	4,057	0
Proceeds from the sale of other investments	4,116	10,336
Proceeds from the maturity of and principal paydowns on securities available for sale	82,513	86,625
Proceeds from the maturity of and principal paydowns on securities held to maturity	3,962	646
Proceeds from the maturity of and principal paydowns on time deposits in other financial institutions	250	250
Purchase of securities available for sale	(594,135)	(529,670)
Purchase of other investments	(1,867)	(9,009)
Net (increase) decrease in loans and leases	98,232	(184,039)
Purchase of bank owned life insurance policies	0	(1,100)
Capital expenditures	(7,360)	(3,984)
Net cash and cash equivalents received in acquisition	8,084	7,103
Proceeds from the sale of equipment	485	15
Proceeds on sale of OREO and other repossessed assets	3,161	5,402
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES	223,873	(91,399)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits and savings accounts	61,509	64,348
Net increase (decrease) in time deposit accounts	(277,871)	50,980
Net increase (decrease) in short-term borrowings	(63,807)	86,718
Proceeds from short term FHLB advances	210,000	248,100
Repayments of short term FHLB advances	(172,150)	(212,000)
Proceeds from other borrowings	40,000	29,000
Repayments of other borrowings	(14,495)	(134,389)
Redemption of preferred stock	(81,698)	0
Purchase of treasury stock	(1,698)	(2,173)
Proceeds from issuance of common stock	1,101	1,578
Excess tax benefits on exercised stock options	1,100	651
Dividends paid	(5,130)	(4,527)
NET CASH PROVIDED (USED) BY FINANCING ACTIVITIES	(303,139)	128,286
Net increase (decrease) in cash and cash equivalents	(28,849)	45,851
Cash and cash equivalents at beginning of year	258,799	73,871
CASH AND CASH EQUIVALENTS AT END OF PERIOD	229,950	119,722
Supplemental disclosures:
Cash paid for income/franchise taxes	12,570	6,969
Cash paid for interest	16,595	20,836
Loans transferred to OREO	1,359	4,046
Sales of securities available for sale, accrued, not settled	2,201	34,129
Purchase of securities available for sale, accrued, not settled	64	0
Stock consideration granted for acquisition	$ 57,433	$ 53,052