Consolidated Statement of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income	$ 11,765	$ 11,528
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	7,505	6,803
Provision for loan losses	11,000	15,000
Stock based compensation	626	585
Securities gains, net	(116)	(557)
Losses and write downs on sales of other real estate owned	1,146	2,204
Loss on prepayment of borrowings		482
Changes in assets and liabilities:
Other assets and accrued interest receivable	7,915	(2,612)
Accrued expenses and other liabilities	3,225	646
Mortgage loans held for sale	10,531	(928)
Net cash provided by operating activities	53,597	33,151
Investment securities held-to-maturity:
Proceeds from maturities and calls	17,501	25,653
Purchases	(4,993)
Investment securities available-for-sale:
Proceeds from sales	15,751	61,585
Proceeds from maturities and calls	132,211	142,236
Purchases	(219,349)	(253,229)
Net increase in loans	(36,224)	(41,418)
Funds collected from FDIC under loss sharing agreements	2,452	2,568
Proceeds from sales of premises and equipment	550	14
Purchases of premises and equipment	(2,001)	(1,614)
Proceeds from sale of other real estate	5,726	6,696
Net cash used in investing activities	(88,376)	(57,509)
Financing activities:
Net change in deposits	73,712	(97,444)
Net change in short-term borrowings	(575)	(652)
Proceeds from Federal Home Loan Bank advances	185,000	499,000
Settlement of Federal Home Loan Bank advances	(225,000)	(324,982)
Proceeds from issuance of common stock for dividend reinvestment and employee benefit plans	189	278
Cash dividends on preferred stock	(2,668)	(2,672)
Net cash provided by financing activities	30,658	73,528
Net change in cash and cash equivalents	(4,121)	49,170
Cash and cash equivalents at beginning of period	251,149	378,416
Cash and cash equivalents at end of period	247,028	427,586
Cash paid during the period for:
Interest	8,025	12,252
Income taxes	1,659	1,026
Unsettled securities sales		43,527
Unsettled securities purchases		119,565
Transfers of loans to foreclosed property	$ 6,288	$ 9,534