Note 10 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

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

	2013			2012			2011
	(In thousands)
Federal:
Current	$	17,808		$	17,330		$	17,314
Deferred		(464	)		(590	)		435
Total federal tax provision		17,344			16,740			17,749
State and Local:
Current		5,828			5,321			5,470
Deferred		(216	)		(214	)		250
Total state and local tax provision		5,612			5,107			5,720
Total income tax provision	$	22,956		$	21,847		$	23,469

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

	2013					2012					2011
	(Dollars in thousands)
Taxes at federal statutory rate	$	21,248		35.0	%	$	19,662		35.0	%	$	20,586		35.0	%
Increase (reduction) in taxes resulting from:
State and local income tax, net of Federal income tax benefit		3,648		6.0			3,320		5.9			3,718		6.3
Other		(1,940	)	(3.2	)		(1,135	)	(2.0	)		(835	)	(1.4	)
Taxes at effective rate	$	22,956		37.8	%	$	21,847		38.9	%	$	23,469		39.9	%

Schedule of Components of the Income Taxes Attributable to Income From Operations and Changes in Equity [Table Text Block]

	2013			2012			2011
	(In thousands)
Income from operations	$	22,956		$	21,847		$	23,469
Equity:
Change in fair value of securities available for sale		(21,309	)		5,577			8,398
Current year actuarial gains (losses) of postretirement plans		2,527			(340	)		(1,932	)
Amortization of net actuarial losses and prior service credits		521			436			223
Compensation expense for tax purposes in (excess) or less than that recognized for financial reporting purposes		(443	)		303			(292	)
Total income taxes	$	4,252		$	27,823		$	29,866

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

	2013		2012
	(In thousands)
Deferred tax asset:
Postretirement benefits	$	4,880	$	4,114
Allowance for loan losses		13,895		13,592
Stock based compensation		2,322		2,373
Depreciation		1,400		1,212
Unrealized loss on securities available for sale		6,612		-
Fair value adjustment on financial assets carried at fair value		2,470		3,152
Other-than-temporary impairment charges		1,584		2,700
Adjustment required to recognize funded status of postretirement pension plans		2,218		5,266
Other		2,336		1,991
Deferred tax asset		37,717		34,400
Deferred tax liability:
Core deposit intangibles		-		205
Valuation differences resulting from acquired assets and liabilities		2,805		2,849
Fair value adjustment on financial liabilities carried at fair value		14,910		15,781
Unrealized gains on securities available for sale		-		14,697
Other		1,898		1,705
Deferred tax liability		19,613		35,237
Net deferred tax (liability) asset included in other (liabilities) assets	$	18,104	$	(837	)