Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Current and Deferred Income Tax Expense (Benefit)

		Years Ended December 31,
		2012		2011		2010
		($ in Thousands)
Current:
	Federal	$	19,724	$	9,336	$	(91,578)
	State		1,468		(350)		598
Total current			21,192		8,986		(90,980)
Deferred:
	Federal		41,908		37,553		54,046
	State		12,386		(2,811)		(3,238)
Total deferred			54,294		34,742		50,808
Total income tax expense (benefit)		$	75,486	$	43,728	$	(40,172)

Schedule of Deferred Tax Assets and Liabilities

		2012		2011
		($ in Thousands)
Gross deferred tax assets:
	Allowance for loan losses	$	115,128	$	146,027
	Allowance for other losses		18,205		13,714
	Accrued liabilities		6,055		11,506
	Deferred compensation		27,073		24,638
	Securities valuation adjustment		2,258		17,978
	Benefit of tax loss and credit carryforwards		46,376		51,835
	Nonaccrual interest		1,112		4,042
	Other		8,518		7,017
Total gross deferred tax assets			224,725		276,757
Gross deferred tax liabilities:
	FHLB stock dividends		7,602		10,424
	Prepaid expenses		55,944		49,828
	Intangible amortization		28,478		28,274
	Mortgage banking activities		6,257		4,796
	Deferred loan fee income		26,800		22,914
	State income taxes		16,083		20,418
	Leases		2,269		3,955
	Depreciation		22,386		23,368
	Other		2,225		1,805
Total gross deferred tax liabilities			168,044		165,782
Net deferred tax assets			56,681		110,975
Tax effect of unrealized gain related to available for sale securities			(53,579)		(62,447)
Tax effect of unrealized loss related to pension and postretirement benefits			23,586		21,219
			(29,993)		(41,228)
Net deferred tax assets including tax effected items		$	26,688	$	69,747

Summary of Valuation Allowance

		2012		2011
		($ in Thousands)
Valuation allowance for deferred tax assets, beginning of year		$	-	$	5,984
	Decrease in current year		-		(5,984)
Valuation allowance for deferred tax assets, end of year		$	-	$	-

Schedule of Effective Income Tax Rate Reconciliation

		2012		2011		2010
Federal income tax rate at statutory rate		35.0	%	35.0	%	35.0	%
Increases (decreases) resulting from:
	Tax-exempt interest and dividends	(4.9)		(7.0)		34.1
	State income taxes (net of federal income taxes)	3.5		3.8		4.2
	Bank owned life insurance	(1.9)		(2.8)		13.3
	Valuation allowance	0.0		(3.3)		(0.5)
	Federal tax credits	(0.3)		(0.9)		3.9
	Tax reserve adjustments	(1.8)		(0.6)		10.8
	Compensation deduction limitations	0.3		0.7		(4.8)
	Other	(0.2)		(1.1)		1.9
Effective income tax rate		29.7	%	23.8	%	97.9	%

Summary Unrecognized Tax Benefits

	2012		2011
	($ in Millions)
Balance at beginning of year	$	21	$	23
Changes in tax positions for prior years		-		5
Statute expiration		(8)		(7)
Balance at end of year	$	13	$	21