Note 11 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

March 31, 2017	Fair Value Measurements Using						Total at
	Level 1		Level 2		Level 3		Fair Value
	(In thousands)
Assets
Securities available-for-sale
U.S. Treasury securities	$	419,470	$	-	$	-	$	419,470
U.S. government sponsored entities		-		391,986		-		391,986
Mortgage-backed securities		-		320,163		-		320,163
Corporate debt securities		-		75,010		-		75,010
Mutual funds		6,230		-		-		6,230
Preferred stock of government sponsored entities		5,978		-		-		5,978
Other equity securities		8,892		-		-		8,892
Total securities available-for-sale		440,570		787,159		-		1,227,729
Warrants		-		-		102		102
Interest rate swaps		-		1,851		-		1,851
Foreign exchange contracts		-		1,148		-		1,148
Total assets	$	440,570	$	790,158	$	102	$	1,230,830
Liabilities
Option contracts	$	-	$	180	$	-	$	180
Foreign exchange contracts		-		647		-		647
Interest rate swaps		-		3,228		-		3,228
Total liabilities	$	-	$	4,055	$	-	$	4,055

December 31, 2016	Fair Value Measurements Using						Total at
	Level 1		Level 2		Level 3		Fair Value
	(In thousands)
Assets
Securities available-for-sale
U.S. Treasury securities	$	489,017	$	-	$	-	$	489,017
U.S. government sponsored entities		-		390,331		-		390,331
Mortgage-backed securities		-		336,260		-		336,260
Collateralized mortgage obligations		-		28		-		28
Corporate debt securities		-		74,350		-		74,350
Mutual funds		6,230		-		-		6,230
Preferred stock of government sponsored entities		7,308		-		-		7,308
Other equity securities		10,821		-		-		10,821
Total securities available-for-sale		513,376		800,969		-		1,314,345
Warrants		-		-		79		79
Interest rate swaps		-		938		-		938
Foreign exchange contracts		-		1,302		-		1,302
Total assets	$	513,376	$	803,209	$	79	$	1,316,664
Liabilities
Option contracts	$	-	$	121	$	-	$	121
Interest rate swaps		-		3,744		-		3,744
Foreign exchange contracts		-		3,132		-		3,132
Total liabilities	$	-	$	6,997	$	-	$	6,997

Fair Value Measurements, Nonrecurring [Table Text Block]

	March 31, 2017								Total Losses
	Fair Value Measurements Using						Total at		Three Months Ended
	Level 1		Level 2		Level 3		Fair Value		March 31, 2017		March 31, 2016
	(In thousands)
Assets
Impaired loans by type:
Commercial loans	$	-	$	-	$	917	$	917	$	20	$	-
Commercial mortgage loans		-		-		14,996		14,996		250		-
Residential mortgage loans and equity lines		-		-		11,453		11,453		-		-
Total impaired loans		-		-		27,366		27,366		270		-
Other real estate owned (1)		-		3,280		4,322		7,602		37		128
Investments in venture capital and private company stock		-		-		3,469		3,469		187		110
Total assets	$	-	$	3,280	$	35,157	$	38,437	$	494	$	238

	December 31, 2016								Total Losses
	Fair Value Measurements Using						Total at		Twelve Months Ended
	Level 1		Level 2		Level 3		Fair Value		December 31, 2016		December 31, 2015
	(In thousands)
Assets
Impaired loans by type:
Commercial loans	$	-	$	-	$	2,813	$	2,813	$	322	$	806
Commercial mortgage loans		-		-		9,444		9,444		-		598
Residential mortgage loans and equity lines		-		-		11,679		11,679		-		146
Total impaired loans		-		-		23,936		23,936		322		1,550
Other real estate owned (1)		-		6,006		4,372		10,378		9		404
Investments in venture capital and private company stock		-		-		3,667		3,667		976		553
Total assets	$	-	$	6,006	$	31,975	$	37,981	$	1,307	$	2,507