Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Summary of Differences in Taxes from Continuing Operations

(dollars in thousands)		2012			2011			2010
Provision at statutory rate of 35%	$	44,725		$	34,917		$	15,218
Tax-exempt income:
Tax-exempt interest		(8,590	)		(8,035	)		(9,060	)
Section 291/265 interest disallowance		147			213			329
Bank owned life insurance income		(2,258	)		(1,863	)		(1,418	)
Tax-exempt income		(10,701	)		(9,685	)		(10,149	)
Reserve for unrecognized tax benefits		(292	)		(623	)		(652	)
State income taxes		3,409			3,188			518
Other, net		(1,031	)		(495	)		331
Income tax expense	$	36,110		$	27,302		$	5,266
Effective tax rate		28.3	%		27.4	%		12.1	%

Provision for Deferred Income Taxes

(dollars in thousands)		2012		2011		2010
Income taxes currently payable
Federal	$	21,015	$	6,742	$	2,687
State		1,975		288		0
Deferred income taxes related to:
Federal		11,052		17,422		2,230
State		2,068		2,850		349
Deferred income tax expense		13,120		20,272		2,579
Provision for income taxes	$	36,110	$	27,302	$	5,266

Schedule of Significant Components of Net Deferred Tax Assets (Liabilities)

(dollars in thousands)		2012			2011
Deferred Tax Assets
Allowance for loan losses,
net of recapture	$	20,861		$	24,100
Benefit plan accruals		18,389			7,881
AMT credit		23,029			25,765
Unrealized losses on benefit plans		8,347			9,665
Net operating loss carryforwards		5,135			2,860
Premises and equipment		30,790			30,348
Federal tax credits		0			4,066
Other-than-temporary-impairment		7,546			9,776
Loans - ASC 310		90,516			63,658
Other real estate owned		8,715			3,209
Lease exit obligation		1,232			289
Other, net		5,415			5,743
Total deferred tax assets		219,975			187,360
Deferred Tax Liabilities
Accretion on investment securities		(590	)		(717	)
Lease receivable, net		(3,757	)		(5,263	)
Purchase accounting		(6,737	)		(4,215	)
FDIC indemnification asset		(64,152	)		(64,672	)
Unrealized gains on available-
for-sale investment securities		(24,972	)		(15,873	)
Unrealized gains on held-to-
maturity securities		(2,177	)		(3,159	)
Unrealized gains on hedges		0			(96	)
Other, net		(1,274	)		(1,673	)
Total deferred tax liabilities		(103,659	)		(95,668	)
Net deferred tax assets	$	116,316		$	91,692

Summary Of Reconciliation Of Unrecognized Tax Benefits

(dollars in thousands)		2012			2011			2010
Balance at January 1	$	4,145		$	4,553		$	8,500
Additions based on tax positions related to the current year		2			4			3,806
Reductions due to statute of limitations expiring		(194	)		(412	)		(3,440	)
Reductions for tax positions of prior years		0			0			(4,313	)
Balance at December 31	$	3,953		$	4,145		$	4,553