Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 20,009	$ 15,709
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	7,713	5,747
Provision for loan and lease losses	2,067	1,671
Net amortization of premium on securities	7,846	6,949
Securities gains, net	(3,526)	(4,353)
Stock based compensation	1,087	1,139
Write downs and losses on repossessed assets, net	313	353
Loans originated for sale	(227,823)	(311,140)
Proceeds on sales of loans held for sale	234,516	287,768
Net gains on sale of loans held for sale	(8,475)	(11,056)
Decrease in accrued interest receivable	787	3,234
(Increase) decrease in prepaid expenses	598	(513)
Increase in accrued interest payable	637	627
Capitalization of servicing rights	(2,590)	(2,818)
Other, net	(9,855)	(11,472)
NET CASH PROVIDED (USED) BY OPERATING ACTIVITIES	23,304	(18,155)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of securities available for sale	303,448	289,466
Proceeds from the sale of securities held to maturity	4,057	0
Proceeds from the sale of other investments	2,830	5,489
Proceeds from the maturity of and principal paydowns on securities available for sale	35,379	37,479
Proceeds from the maturity of and principal paydowns on securities held to maturity	3,254	208
Purchase of securities available for sale	(362,764)	(232,422)
Purchase of other investments	(226)	(2,004)
Net increase in loans and leases	78,502	25,684
Capital expenditures	(898)	(2,919)
Net cash and cash equivalents received in acquisition	8,084	7,103
Proceeds from the sale of equipment	0	13
Proceeds on sale of OREO and other repossessed assets	2,384	2,312
NET CASH PROVIDED BY INVESTING ACTIVITIES	74,050	130,409
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits and savings accounts	1,759	90,075
Net decrease in time deposit accounts	(131,373)	(25,618)
Net increase (decrease) in short-term borrowings	1,077	(31,765)
Proceeds from short term FHLB advances	5,000	60,000
Repayments of short term FHLB advances	(10,000)	(124,000)
Proceeds from other borrowings	0	4,000
Repayments of other borrowings	(5,501)	(44,488)
Redemption of preferred stock	(81,698)	0
Purchase of treasury stock	(1,227)	(1,780)
Proceeds from issuance of common stock	563	832
Excess tax benefits on exercised stock options	1,100	612
Dividends paid	(2,625)	(2,261)
NET CASH USED BY FINANCING ACTIVITIES	(222,925)	(74,393)
Net increase (decrease) in cash and cash equivalents	(125,571)	37,861
Cash and cash equivalents at beginning of year	258,799	73,871
CASH AND CASH EQUIVALENTS AT END OF PERIOD	133,228	111,732
Supplemental disclosures:
Cash paid for income/franchise taxes	2,305	840
Cash paid for interest	7,340	8,545
Loans transferred to OREO	442	2,371
Purchases of securities available for sale, accrued, not paid	0	5,149
Sales of securities available for sale, accrued, not settled	17,189	0
Stock consideration granted for acquisition	$ 57,433	$ 53,052