Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 61,187	$ 45,451
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	22,975	16,325
Provision for loan losses	9,513	10,526
Net amortization of premium on securities	24,093	21,339
Securities gains, net	(9,732)	(9,230)
Stock based compensation	3,073	2,635
Write downs and losses on repossessed assets, net	1,094	1,686
Loans originated for sale	(863,354)	(1,087,510)
Proceeds on sales of loans held for sale	883,758	1,083,285
Net gains on sale of loans held for sale	(23,938)	(27,102)
Increase (decrease) in accrued interest receivable	(1,054)	170
Increase in prepaid expenses	(128)	(1,021)
Increase (decrease) in accrued interest payable	332	(177)
Capitalization of servicing rights	(9,856)	(11,766)
Valuation adjustment on commercial servicing rights	41	0
Write downs and losses on sales of assets, net	(30)	897
Other, net	(2,419)	8,137
NET CASH PROVIDED BY OPERATING ACTIVITIES	95,555	53,645
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of securities available for sale	768,617	877,077
Proceeds from the sale of securities held to maturity	4,557	0
Proceeds from the sale of other investments	4,722	12,917
Proceeds from the sale of time deposits in other financial institutions	0	2,925
Proceeds from the maturity of and principal paydowns on securities available for sale	130,549	124,084
Proceeds from the maturity of and principal paydowns on securities held to maturity	8,271	1,338
Proceeds from the maturity of and principal paydowns on time deposits in other financial institutions	250	250
Proceeds from the maturity of and principal paydowns on other investments	0	619
Purchase of securities available for sale	(888,903)	(774,657)
Purchase of other investments	(1,875)	(9,833)
Net (increase) decrease in loans	138,725	(225,356)
Purchase of bank owned life insurance policies	0	(1,100)
Proceeds from bank owned life insurance policies	111	0
Capital expenditures	(8,318)	(4,982)
Net cash and cash equivalents received (paid) in acquisitions	8,084	(6,861)
Proceeds from the sale of equipment	686	1,108
Proceeds on sale of OREO and other repossessed assets	3,266	6,328
NET CASH PROVIDED BY INVESTING ACTIVITIES	168,742	3,857
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits	160,313	191,361
Net increase (decrease) in savings deposits	51,530	(73,050)
Net decrease in time deposit accounts	(353,084)	(26,326)
Net decrease in short-term borrowings	(101,409)	(25,901)
Proceeds from short term FHLB advances	243,100	276,100
Repayments of short term FHLB advances	(257,250)	(270,000)
Proceeds from other borrowings	40,000	29,000
Repayments of other borrowings	(15,562)	(134,803)
Redemption of preferred stock	(81,698)	0
Purchase of treasury stock	(2,293)	(2,856)
Proceeds from issuance of common stock	1,863	2,330
Excess tax benefits on exercised stock options	1,121	671
Dividends paid	(7,638)	(6,794)
NET CASH USED BY FINANCING ACTIVITIES	(321,007)	(40,268)
Net increase (decrease) in cash and cash equivalents	(56,710)	17,234
Cash and cash equivalents at beginning of year	258,799	73,871
CASH AND CASH EQUIVALENTS AT END OF PERIOD	202,089	91,105
Supplemental disclosures:
Cash paid for income/franchise taxes	16,550	7,305
Cash paid for interest	23,864	24,690
Loans transferred to OREO	1,359	5,206
Purchases of securities available for sale, accrued, not paid	0	3,523
Sales of securities available for sale, accrued, not settled	250	0
Stock consideration granted for acquisition	$ 57,433	$ 53,052