Note 10 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	2016			2015			2014
	(In thousands)
Federal:
Current	$	34,996		$	25,319		$	18,052
Deferred		(1,416	)		(3,476	)		2,860
Total federal tax provision		33,580			21,843			20,912
State and Local:
Current		7,647			7,059			6,369
Deferred		(124	)		(1,735	)		1,292
Total state and local tax provision		7,523			5,324			7,661
Total income tax provision	$	41,103		$	27,167		$	28,573

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

	2016					2015					2014
	(Dollars in thousands)
Taxes at federal statutory rate	$	37,106		35.0	%	$	25,681		35.0	%	$	25,484		35.0	%
Increase (reduction) in taxes resulting from:
State and local income tax, net of Federal income tax benefit		4,890		4.6			3,461		4.7			4,980		6.8
Other		(893	)	(0.8	)		(1,975	)	(2.7	)		(1,891	)	(2.6	)
Taxes at effective rate	$	41,103		38.8	%	$	27,167		37.0	%	$	28,573		39.2	%

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

	2016		2015
	(In thousands)
Deferred tax asset:
Postretirement benefits	$	7,800	$	6,798
Allowance for loan losses		9,518		9,437
Stock based compensation		3,525		3,404
Depreciation		2,135		1,941
Unrealized loss on securities available for sale		2,770		395
Derivative financial instruments		1,027		1,724
Adjustment required to recognize funded status of postretirement pension plans		3,246		3,833
Gain on sale of buildings		2,211		2,531
Other		2,434		2,460
Deferred tax asset		34,666		32,523
Deferred tax liability:
Fair value adjustment on financial assets carried at fair value		150		187
Fair value adjustment on financial liabilities carried at fair value		11,943		14,364
Other		4,684		3,411
Deferred tax liability		16,777		17,962
Net deferred tax asset included in other assets	$	17,889	$	14,561