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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Taxes

Schedule of current and deferred portions of net income tax expense

		2014			2013			2012
		(Dollars in Thousands)
Current
U.S.		$	72,561		$	59,583		$	40,375
State			5,252			(1,530	)		2,234
Foreign			1			3			33
​	​	​	​	​	​	​	​	​	​	​
Total current taxes			77,814			58,056			42,642
​	​	​	​	​	​	​	​	​	​	​
Deferred
U.S.			(969	)		(1,692	)		7,928
State			(58	)		(125	)		(5	)
​	​	​	​	​	​	​	​	​	​	​
Total deferred taxes			(1,027	)		(1,817	)		7,923
​	​	​	​	​	​	​	​	​	​	​
Total income taxes		$	76,787		$	56,239		$	50,565
​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​

Schedule of income tax expense differences from the amount computed by applying the U.S. Federal income tax rate to income before income taxes

		2014			2013			2012
		(Dollars in Thousands)
Computed expected tax expense		$	80,560		$	64,183		$	55,634
Change in taxes resulting from:
Tax-exempt interest income			(4,554	)		(4,828	)		(4,381	)
State tax, net of federal income taxes and tax credit			3,377			(110	)		1,446
Tax refunds			—			(966	)		—
Other investment income			(3,615	)		(2,656	)		(2,691	)
Other			1,019			616			557
​	​	​	​	​	​	​	​	​	​	​
Actual tax expense		$	76,787		$	56,239		$	50,565
​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​	​	​	​

Schedule of tax effects of temporary difference that give rise to significant portions of the deferred tax assets and deferred tax liabilities

		2014			2013
		(Dollars in Thousands)
Deferred tax assets:
Loans receivable, principally due to the allowance for probable loan losses		$	24,849		$	25,365
Other real estate owned			3,453			3,878
Impairment charges on available-for-sale securities			5,618			5,327
Accrued expenses			268			399
Net unrealized gains on available for sale investment securities			—			24,235
Other			5,809			4,816
​	​	​	​	​	​	​	​
Total deferred tax assets			39,997			64,020
​	​	​	​	​	​	​	​
Deferred tax liabilities:
Bank premises and equipment, principally due to differences on depreciation			(18,314	)		(20,729	)
Net unrealized gains on available for sale investment securities			(6,182	)		—
Identified intangible assets and goodwill			(18,787	)		(18,051	)
Other			(12,303	)		(11,476	)
​	​	​	​	​	​	​	​
Total deferred tax liabilities			(55,586	)		(50,256	)
​	​	​	​	​	​	​	​
Net deferred tax asset (liability)		$	(15,589	)	$	13,764
​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	​

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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

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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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