Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities
Net Income	$ 40,043	$ 32,681
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses and losses on covered loans	3,581	34,506
Stock-based compensation expense	1,881	1,152
Depreciation, amortization and accretion	30,216	45,873
Net realized gain on sale of securities	462	62
Net realized gain on sale of other assets	(107)	(35)
Net realized (gain) loss on sale of other real estate owned	(8,745)	(8,604)
Write-down on other real estate owned	1,929	7,001
Net change in:
Loans held for sale	1,723	(1,452)
Interest receivable	(9,846)	(1,300)
Interest payable	(88)	(374)
Other assets	1,805	(5,223)
Other liabilities	(2,114)	(3,881)
Net cash provided by operating activities	59,816	100,282
Cash Flows From Investing Activities
Loans originated and acquired, net of principal collected	166,905	72,180
Purchases of securities available for sale	(292,744)	(87,346)
Purchases of premises and equipment	(10,087)	(12,404)
Proceeds from FDIC reimbursement on loss-sharing asset	7,871	49,194
Proceeds from sales of securities available for sale	166,881	3,845
Proceeds from principal repayments and maturities of securities available for sale	241,388	163,584
Proceeds from Sales of Assets, Investing Activities	1,117	25
Proceeds from sales of covered other real estate owned	19,222	25,202
Proceeds from sales of other real estate and other personal property owned	10,779	15,069
Capital improvements on other real estate properties	0	(11)
Payments to Acquire Intangible Assets	(919)	0
Net cash acquired in business combinations	(154,170)	0
Payments for (Proceeds from) Other Investing Activities	(522)	0
Net cash provided by (used in) investing activities	(178,089)	84,978
Cash Flows From Financing Activities
Net increase (decrease) in deposits	23,475	123,326
Proceeds from Federal Home Loan Bank advances	1,144,100	0
Purchase and retirement of common stock	391	0
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(20)	0
Repayments of Subordinated Debt	(51,000)	0
Proceeds from Federal Reserve Bank borrowings	50	0
Proceeds from exercise of stock options	1,154	713
Repayment of Federal Home Loan Bank advances	(1,244,000)	(5,744)
Repayment of Federal Reserve Bank borrowings	(50)	0
Payment of common stock dividends	(14,219)	(35,252)
Net cash used by financing activities	(140,901)	83,043
Increase (Decrease) in cash and cash equivalents	(259,174)	268,303
Cash and cash equivalents at beginning of period	513,926	294,289
Cash and cash equivalents at end of period	254,752	562,592
Non-cash investing activities
Loans transferred to other real estate owned	17,279	15,024
Assets acquired in FDIC-assisted acquisitions (excluding cash and cash equivalents)	2,522,078	0
Stock Issued	276,181	0
Liabilities assumed in FDIC-assisted acquisitions	2,091,727	0
Cash paid for interest	4,830	7,640
Cash paid for income tax	$ 20,221	$ 9,605