Note 3 - Securities (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

(In thousands)	Amortized		Unrealized
March 31, 2019	cost		Gains		Losses			Fair value
Government sponsored enterprise obligations	$	344,590	$	139	$	(1,863	)	$	342,866
Mortgage backed securities - government agencies		138,768		570		(2,207	)		137,131
Obligations of states and political subdivisions		27,095		97		(58	)		27,134
Total securities available for sale	$	510,453	$	806	$	(4,128	)	$	507,131
December 31, 2018
Government sponsored enterprise obligations		264,234		156		(3,351	)		261,039
Mortgage backed securities - government agencies		149,748		282		(3,753	)		146,277
Obligations of states and political subdivisions		29,760		107		(188	)		29,679
Total securities available for sale	$	443,742	$	545	$	(7,292	)	$	436,995

Investments Classified by Contractual Maturity Date [Table Text Block]

(In thousands)	Amortized Cost		Fair Value
Due within 1 year	$	205,633	$	205,367
Due after 1 year but within 5 years		60,622		60,113
Due after 5 years but within 10 years		7,171		7,091
Due after 10 years		98,259		97,429
Mortgage backed securities - government agencies		138,768		137,131
Total securities available for sale	$	510,453	$	507,131

Schedule of Unrealized Loss on Investments [Table Text Block]

(In thousands)	Less than 12 months					12 months or more					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
March 31, 2019	value		losses			value		losses			value		losses
Government sponsored enterprise obligations	$	183,279	$	(151	)	$	133,375	$	(1,712	)	$	316,654	$	(1,863	)
Mortgage-backed securities - government agencies		—		—			109,690		(2,207	)		109,690		(2,207	)
Obligations of states and political subdivisions		—		—			15,490		(58	)		15,490		(58	)
Total temporarily impaired securities	$	183,279	$	(151	)	$	258,555	$	(3,977	)	$	441,834	$	(4,128	)
December 31, 2018
Government sponsored enterprise obligations		96,740		(38	)		149,320		(3,313	)		246,060		(3,351	)
Mortgage-backed securities - government agencies		3,108		(5	)		120,848		(3,748	)		123,956		(3,753	)
Obligations of states and political subdivisions		814		(1	)		17,639		(187	)		18,453		(188	)
Total temporarily impaired securities	$	100,662	$	(44	)	$	287,807	$	(7,248	)	$	388,469	$	(7,292	)