Note 11 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

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

June 30, 2017	Fair Value Measurements Using						Total at
	Level 1		Level 2		Level 3		Fair Value
Assets	(In thousands)
Securities available-for-sale
U.S. Treasury securities	$	569,045	$	-	$	-	$	569,045
U.S. government sponsored entities		-		394,631		-		394,631
Mortgage-backed securities		-		306,907		-		306,907
Corporate debt securities		-		75,410		-		75,410
Mutual funds		6,265		-		-		6,265
Preferred stock of government sponsored entities		5,224		-		-		5,224
Other equity securities		10,869		-		-		10,869
Total securities available-for-sale		591,403		776,948		-		1,368,351
Warrants		-		-		108		108
Foreign exchange contracts		-		2,378		-		2,378
Interest rate swaps		-		1,608		-		1,608
Total assets	$	591,403	$	780,934	$	108	$	1,372,445
Liabilities
Option contracts	$	-	$	231	$	-	$	231
Foreign exchange contracts		-		640		-		640
Interest rate swaps		-		4,770		-		4,770
Total liabilities	$	-	$	5,641	$	-	$	5,641

December 31, 2016	Fair Value Measurements Using						Total at
	Level 1		Level 2		Level 3		Fair Value
Assets	(In thousands)
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]

	June 30, 2017								Total Losses
	Fair Value Measurements Using						Total at		Three Months Ended				Six Months Ended
	Level 1		Level 2		Level 3		Fair Value		June 30, 2017		June 30, 2016		June 30, 2017		June 30, 2016
Assets	(In thousands)
Impaired loans by type:
Commercial loans	$	-	$	-	$	888	$	888	$	497	$	-	$	1,273	$	-
Commercial mortgage loans		-		-		14,915		14,915		-		945		250		945
Residential mortgage loans and equity lines		-		-		11,317		11,317		-		-		-		-
Total impaired loans		-		-		27,120		27,120		497		945		1,523		945
Other real estate owned (1)		-		6,482		4,322		10,804		212		88		249		216
Investments in venture capital and private company stock		-		-		3,240		3,240		166		122		352		231
Total assets	$	-	$	6,482	$	34,682	$	41,164	$	875	$	1,155	$	2,124	$	1,392

	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
Assets	(In thousands)
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