Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Taxes [Abstract]

Current and Deferred Income Tax Expense (Benefit)

		Years Ended December 31,
		2013		2012		2011
		($ in Thousands)
Current:
	Federal	$	50,628	$	19,724	$	9,336
	State		2,653		1,468		(350)
Total current			53,281		21,192		8,986
Deferred:
	Federal		16,409		41,908		37,553
	State		9,511		12,386		(2,811)
Total deferred			25,920		54,294		34,742
Total income tax expense		$	79,201	$	75,486	$	43,728

Schedule of Deferred Tax Assets and Liabilities

		2013		2012
		($ in Thousands)
Gross deferred tax assets:
	Allowance for loan losses	$	104,944	$	115,128
	Allowance for other losses		13,790		18,205
	Accrued liabilities		6,101		6,055
	Deferred compensation		28,911		27,073
	Securities valuation adjustment		1,724		2,258
	Benefit of tax loss and credit carryforwards		32,552		46,376
	Nonaccrual interest		4,431		1,112
	Other		9,433		8,518
Total gross deferred tax assets			201,886		224,725
Gross deferred tax liabilities:
	FHLB stock dividends		6,425		7,602
	Prepaid expenses		61,225		55,944
	Intangible amortization		28,914		28,478
	Mortgage banking activities		14,497		6,257
	Deferred loan fee income		25,480		26,800
	State income taxes		12,754		16,083
	Leases		2,525		2,269
	Depreciation		17,931		22,386
	Other		1,374		2,225
Total gross deferred tax liabilities			171,125		168,044
Net deferred tax assets			30,761		56,681
Tax effect of unrealized (gain) loss related to available for sale securities			7,685		(53,579)
Tax effect of unrealized loss related to pension and postretirement benefits			8,024		23,586
			15,709		(29,993)
Net deferred tax assets including items with tax effect recorded directly to OCI		$	46,470	$	26,688

Schedule of Effective Income Tax Rate Reconciliation

		2013		2012		2011
Federal income tax rate at statutory rate		35.0	%	35.0	%	35.0	%
Increases (decreases) resulting from:
	Tax-exempt interest and dividends	(4.5)		(4.9)		(7.0)
	State income taxes (net of federal income taxes)	2.9		3.6		3.8
	Bank owned life insurance	(1.5)		(1.9)		(2.8)
	Valuation allowance	0.0		0.0		(3.3)
	Federal tax credits	(1.0)		(1.2)		(1.7)
	Tax reserve adjustments	(1.9)		(1.8)		(0.6)
	Compensation deduction limitations	0.1		0.4		0.7
	Other	0.5		0.5		(0.3)
Effective income tax rate		29.6	%	29.7	%	23.8	%

Summary Unrecognized Tax Benefits

	2013		2012
	($ in Millions)
Balance at beginning of year	$	13	$	21
Changes in tax positions for prior years		1		-
Statute expiration		(8)		(8)
Balance at end of year	$	6	$	13