Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 28,918	$ 40,362
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,599	10,128
Provision for loan and lease losses	7,648	4,852
Net amortization of premium on securities	22,417	16,348
Securities gains, net	(6,612)	(14,106)
(Increase) decrease in trading account securities	(839)	117
Impairment loss on securities	0	981
Stock based compensation	1,538	1,611
Loss on sale of OREO and other repossessed property	2,440	5,862
Loans originated for sale	(1,203,402)	(1,103,278)
Proceeds on sales of loans held for sale	1,262,487	1,092,318
Net gains on sales of loans held for sale	(24,246)	(34,941)
(Increase) decrease in accrued interest receivable	94	(2,298)
Decrease in prepaid expenses	8,645	3,037
Decrease in accrued interest payable	(843)	(626)
Capitalization of mortgage servicing rights	(10,595)	(7,916)
Valuation adjustment on mortgage servicing rights	(496)	674
Other, net	(3,825)	3,311
NET CASH PROVIDED BY OPERATING ACTIVITIES	95,928	16,436
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of time deposits in other financial institutions	(3,605)	0
Proceeds from the sale of securities available for sale	347,170	488,350
Proceeds from the maturity of and principal paydowns on securities available for sale	191,683	230,868
Proceeds from the maturity of and principal paydowns on securities held to maturity	1,982	1,414
Purchase of securities available for sale	(545,831)	(760,281)
Net increase in loans and leases	(97,741)	(173,818)
Purchase of bank owned life insurance policies	(2,835)	(4,571)
Capital expenditures	(8,442)	(13,817)
Net cash and cash equivalents received in acquisition	0	41,939
Proceeds on sale of OREO and other repossessed assets	14,304	23,143
NET CASH USED BY INVESTING ACTIVITIES	(103,315)	(166,773)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in demand deposits and savings accounts	138,415	250,433
Net decrease in time deposit accounts	(59,077)	(10,903)
Net decrease in short-term borrowings	(578)	(24,773)
Proceeds from other borrowings	160	11,103
Repayments of other borrowings	(66,647)	(6,387)
Purchase of noncontrolling interest	(2,798)	0
Purchase of treasury stock	(1,601)	(2,485)
Proceeds from issuance of common stock	2,360	2,401
Excess tax benefits on exercised stock options	68	174
Dividends paid	(5,961)	(7,934)
NET CASH PROVIDED BY FINANCING ACTIVITIES	4,341	211,629
Net increase (decrease) in cash and cash equivalents	(3,046)	61,292
Cash and cash equivalents at beginning of year	168,054	129,834
CASH AND CASH EQUIVALENTS AT END OF PERIOD	165,008	191,126
Supplemental disclosures:
Cash paid for income/franchise taxes	4,819	8,136
Cash paid for interest	27,263	30,275
Loans transferred to OREO	13,318	20,192
Purchases of securities available for sale, accrued, not paid	$ 7,540	$ 11,435