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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Tax Disclosure [Abstract]

Income Tax Expense

Income tax expense was as follows:

	2014				2013				2012
Current income tax expense	$	62,177			$	49,736			$	76,928
Deferred income tax expense (benefit)	(4,130		)		3,279				(6,405		)
Income tax expense, as reported	$	58,047			$	53,015			$	70,523

Income Tax Computed by Applying U.S. Federal Statutory Income Tax Rate

Reported income tax expense differed from the amounts computed by applying the U.S. federal statutory income tax rate of 35% to income before income taxes as follows:

	2014				2013				2012
Income tax expense computed at the statutory rate	$	117,608			$	101,808			$	107,966
Effect of tax-exempt interest	(58,761		)		(46,535		)		(36,543		)
Bank owned life insurance income	(1,116		)		(1,086		)		(1,413		)
Other	316				(1,172		)		513
Income tax expense, as reported	$	58,047			$	53,015			$	70,523

Schedule of Deferred Tax Assets and Liabilities

Year-end deferred taxes were as follows:

	2014				2013
Deferred tax assets:
Allowance for loan losses	$	34,840			$	32,353
Net actuarial loss on defined benefit post-retirement benefit plans	26,263				14,070
Stock-based compensation	18,839				17,746
Bonus accrual	6,118				5,301
Gain on sale of assets	2,139				2,234
Partnerships	1,911				2,208
Transaction costs	1,794				565
Other	5,272				4,489
Total gross deferred tax assets	97,176				78,966
Deferred tax liabilities:
Net unrealized gain on securities available for sale and effective cash flow hedging derivatives	(102,626		)		(89,689		)
Premises and equipment	(20,039		)		(21,192		)
Defined benefit post-retirement benefit plans	(15,010		)		(14,137		)
Intangible assets	(6,143		)		(7,253		)
Leases	(4,952		)		(4,237		)
Reserve for medical insurance	(3,017		)		(2,171		)
Prepaid expenses	(1,639		)		(1,618		)
Other	(341		)		(1,456		)
Total gross deferred tax liabilities	(153,767		)		(141,753		)
Net deferred tax asset (liability)	$	(56,591	)		$	(62,787	)

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- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

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