Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 48,576	$ 18,495
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,961	8,695
Provision for loan losses	9,578	10,015
(Gains) losses on other real estate owned	(10)	1,502
Deferred tax expense (benefit)	5,341	(2,035)
Increase in cash surrender value of life insurance contracts	(4,666)	(6,171)
Loss on disposal of other assets	124	78
Net decrease in loans originated for sale	15,670	29,894
Net amortization of securities premium/discount	10,401	13,603
Amortization of intangible assets	7,555	8,304
Stock-based compensation expense	3,535	2,424
Decrease in interest payable and other liabilities	(7,795)	(21,090)
Funds collected under FDIC loss share agreements	29,875	23,600
Increase in FDIC loss share receivable	(3,490)	(33,285)
Decrease in other assets	9,803	24,524
Other, net	(102)	(15)
Net cash provided by operating activities	132,356	78,538
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale		477
Proceeds from maturities of securities available for sale	193,403	348,222
Purchases of securities available for sale	(1,017,609)	(10,013)
Proceeds from maturities of securities held to maturity	161,558
Purchases of securities held to maturity	(308,988)	(253,114)
Net decrease in interest-bearing bank deposits	1,024,541	176,408
Net increase in federal funds sold and short term investments	(30)	(494)
Net decrease in loans	74,269	45,143
Purchases of property, equipment and intangible assets	(11,719)	(3,756)
Proceeds from sales of property and equipment	99	1,799
Proceeds from sales of other real estate	38,242	24,457
Other, net	(2,483)
Net cash provided by investing activities	151,283	329,129
CASH FLOWS FROM FINANCING ACTIVITIES:
Net decrease in deposits	(490,837)	(280,813)
Net increase (decrease) in short-term borrowings	83,404	(194,165)
Repayments of long-term debt	(8,822)
Issuance of long term debt	6,153	6,382
Dividends paid	(20,786)	(20,586)
Proceeds from exercise of stock options	233	1,382
Net cash used in financing activities	(430,655)	(487,800)
NET DECREASE IN CASH AND DUE FROM BANKS	(147,016)	(80,133)
CASH AND DUE FROM BANKS, BEGINNING	448,491	437,947
CASH AND DUE FROM BANKS, ENDING	301,475	357,814
SUPPLEMENTAL INFORMATION FOR NON-CASH INVESTING AND FINANCING ACTIVITIES
Assets acquired in settlement of loans	13,322	21,326
Transfers from available for sale securities to held to maturity securities		$ 1,484,957