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Note 10 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

		2015				2014				2013
		(In thousands)
Federal:
Current		$	25,319			$	18,052			$	17,808
Deferred			(3,476	)			2,860				(464	)
Total federal tax provision			21,843				20,912				17,344
State and Local:
Current			7,059				6,369				5,828
Deferred			(1,735	)			1,292				(216	)
Total state and local tax provision			5,324				7,661				5,612
Total income tax provision		$	27,167			$	28,573			$	22,956

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

		2015								2014								2013
		(Dollars in thousands)
Taxes at federal statutory rate		$	25,681				35.0	%		$	25,484				35.0	%		$	21,248				35.0	%
Increase (reduction) in taxes resulting from:
State and local income tax, net of Federal income tax benefit			3,461				4.7				4,980				6.8				3,648				6.0
Other			(1,975	)			(2.7	)			(1,891	)			(2.6	)			(1,940	)			(3.2	)
Taxes at effective rate		$	27,167				37.0	%		$	28,573				39.2	%		$	22,956				37.8	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

		2015				2014
		(In thousands)
Deferred tax asset:
Postretirement benefits		$	6,798			$	5,407
Allowance for loan losses			9,437				11,007
Stock based compensation			3,404				2,821
Depreciation			1,941				1,740
Unrealized loss on securities available for sale			395				-
Derivative financial instruments			1,724				1,025
Adjustment required to recognize funded status of postretirement pension plans			3,833				4,787
Gain on sale of buildings			2,531				-
Other			2,460				3,023
Deferred tax asset			32,523				29,810
Deferred tax liability:
Valuation differences resulting from acquired assets and liabilities			-				2,764
Fair value adjustment on financial assets carried at fair value			187				132
Fair value adjustment on financial liabilities carried at fair value			14,364				14,480
Unrealized gains on securities available for sale			-				2,588
Other			3,411				2,525
Deferred tax liability			17,962				22,489
Net deferred tax asset included in other assets		$	14,561			$	7,321

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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
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

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- Definition

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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