Note 15 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

As of 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

As of December 31, 2015	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	$	284,288	$	-	$	-	$	284,288
U.S. government sponsored entities		-		148,160		-		148,160
Mortgage-backed securities		-		1,062,269		-		1,062,269
Collateralized mortgage obligations		-		36		-		36
Corporate debt securities		-		73,855		-		73,855
Mutual funds		5,833		-		-		5,833
Preferred stock of government sponsored entities (1)		3,216		-		-		3,216
Other equity securities (1)		8,695		-		-		8,695
Total securities available-for-sale		302,032		1,284,320		-		1,586,352
Warrants		-		-		62		62
Foreign exchange contracts		-		3,339		-		3,339
Total assets	$	302,032	$	1,287,659	$	62	$	1,589,753
Liabilities
Option contracts	$	-	$	28	$	-	$	28
Interest rate swaps		-		6,496		-		6,496
Foreign exchange contracts		-		4,124		-		4,124
Total liabilities	$	-	$	10,648	$	-	$	10,648

Fair Value Measurements, Nonrecurring [Table Text Block]

	As of December 31, 2016								Total Losses/(Gains)
	Fair Value Measurements Using						Total at		For the 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 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

	As of December 31, 2015								Total Losses/(Gains)
	Fair Value Measurements Using						Total at		For the Twelve Months Ended
	Level 1		Level 2		Level 3		Fair Value		December 31, 2015		December 31, 2014
	(In thousands)
Assets
Impaired loans by type:
Commercial loans	$	-	$	-	$	6,317	$	6,317	$	806	$	17
Commercial mortgage loans		-		-		20,359		20,359		598		3,914
Residential mortgage and equity lines		-		-		13,009		13,009		146		27
Total impaired loans		-		-		39,685		39,685		1,550		3,958
Other real estate owned (1)		-		10,047		4,235		14,282		404		202
Investments in venture capital and private company stock		-		-		4,922		4,922		553		436
Total assets	$	-	$	10,047	$	48,842	$	58,889	$	2,507	$	4,596