Income Taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Taxes [Abstract]

Summary Of Income Tax Expense

	2011			2010		2009
	(in thousands)
Current expense:
Federal	$	52,207		$	24,195	$	49,790
State		26,610			11,400		12,592
		78,817			35,595		62,382
Deferred expense (benefit):
Federal and State		(15,285	)		20,176		(10,898	)
Total income tax expense	$	63,532		$	55,771	$	51,484

Summary Of Deferred Tax Assets And Liabilities

	2011		2010
	(in thousands)
Deferred tax assets:
Allowance for loan losses	$	54,880	$	51,118
Depreciation		1,666		5,009
Pension plans		2,771		8,080
Employee benefits		9,102		6,535
Investment securities, including other-than-temporary impairment losses		35,569		3,875
State net operating loss carryforwards		63,806		59,267
Other		21,669		18,413
Total deferred tax assets		189,463		152,297
Deferred tax liabilities:
Purchase accounting		8,727		20,636
Other		16,778		26,406
Total deferred tax liabilities		25,505		47,042
Net deferred tax asset (included in other assets)	$	163,958	$	105,255

Summary Of Income Tax Reconciliation

	2011			2010			2009
	(in thousands)
Federal income tax at expected statutory rate	$	69,015		$	65,429		$	58,641
(Decrease) increase due to:
Tax-exempt interest, net of interest incurred to carry tax-exempt securities		(3,736	)		(3,451	)		(3,257	)
Bank owned life insurance		(2,583	)		(2,158	)		(1,995	)
State income tax expense (benefit), net of federal tax effect		12,727			629			(4	)
Tax credits		(12,760	)		(5,071	)		(2,632	)
Other, net		869			393			731
Income tax expense	$	63,532		$	55,771		$	51,484

Summary Of Reconciliation Of Gross Unrecognized Tax Benefits

	2011			2010			2009
	(in thousands)
Beginning balance	$	21,142		$	21,965		$	21,261
Additions based on tax positions related to the current year		—			—			484
Additions based on tax positions related to prior years		13,366			732			762
Reductions due to expiration of statute of limitations		(1,508	)		(1,555	)		(542	)
Ending balance	$	33,000		$	21,142		$	21,965