Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows From Operating Activities
Net Income	$ 20,801	$ 14,411
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses and losses on covered loans	35,623	4,029
Stock-based compensation expense	908	763
Depreciation, amortization and accretion	30,478	28,529
Net realized gain on sale of securities	62	0
Net realized gain on sale of other assets	(41)	(3)
Net realized (gain) loss on sale of other real estate owned	(6,277)	(5,455)
Gain on termination of cash flow hedging instruments	0	(222)
Write-down on other real estate owned	5,812	4,559
Net change in:
Loans held for sale	60	99
Interest receivable	(273)	(1,940)
Interest payable	(275)	(1)
Other assets	(7,424)	(203)
Other liabilities	(4,945)	(2,045)
Net cash provided by operating activities	74,385	42,521
Cash Flows From Investing Activities
Loans originated and acquired, net of principal collected	(63,362)	(27,829)
Purchases of securities available for sale	(87,346)	(269,966)
Purchases of premises and equipment	(11,630)	(2,388)
Proceeds from FDIC reimbursement on loss-sharing asset	34,313	44,892
Proceeds from sales of securities available for sale	3,845	0
Proceeds from principal repayments and maturities of securities available for sale	108,517	60,247
Proceeds from disposal of premises and equipment	9	20
Proceeds from sales of covered other real estate owned	18,381	11,081
Proceeds from sales of other real estate and other personal property owned	11,899	7,874
Capital improvements on other real estate properties	(11)	(468)
Decrease in Small Business Administration secured borrowings	0	(642)
Net cash acquired in business combinations	0	39,010
Net cash provided by (used in) investing activities	14,615	(138,169)
Cash Flows From Financing Activities
Net increase (decrease) in deposits	15,288	(134,906)
Proceeds from Federal Home Loan Bank advances	0	100
Proceeds from Federal Reserve Bank borrowings	0	100
Proceeds from exercise of stock options	314	410
Repayment of Federal Home Loan Bank advances	(5,727)	(11,401)
Repayment of Federal Reserve Bank borrowings	0	(100)
Payment of common stock dividends	(23,351)	(3,154)
Payments for purchase and retirement of common stock	0	(32)
Net cash used by financing activities	(13,476)	(148,983)
Increase (Decrease) in cash and cash equivalents	75,524	(244,631)
Cash and cash equivalents at beginning of period	294,289	514,130
Cash and cash equivalents at end of period	369,813	269,499
Supplemental Information:
Cash paid for interest	5,337	8,097
Cash paid for income tax	0	0
Non-cash investing activities
Assets acquired in FDIC-assisted acquisitions (excluding cash and cash equivalents)	0	257,104
Liabilities assumed in FDIC-assisted acquisitions	0	296,114
Loans transferred to other real estate owned	$ 11,789	$ 8,240