Note 16 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block [Abstract]

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

As of December 31, 2014	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	$	664,004			$	-	$	664,004
Mortgage-backed securities		-		544,303		-		544,303
Collateralized mortgage obligations		-		45		-		45
Corporate debt securities		-		94,472		-		94,472
Mutual funds		5,866		-		-		5,866
Preferred stock of government sponsored entities		-		3,224		-		3,224
Other equity securities		-		7,021		-		7,021
Total securities available-for-sale		669,870		649,065		-		1,318,935
Warrants		-		-		27		27
Foreign exchange contracts		-		1,876		-		1,876
Total assets	$	669,870	$	650,941	$	27	$	1,320,838
Liabilities
Interest rate swaps	$	-	$	4,626	$	-	$	4,626
Foreign exchange contracts		-		5,007		-		5,007
Total liabilities	$	-	$	9,633	$	-	$	9,633

As of December 31, 2013	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	$	460,193	$	-	$	-	$	460,193
Mortgage-backed securities		-		952,814		-		952,814
Collateralized mortgage obligations		-		6,106		-		6,106
Asset-backed securities		-		123		-		123
Corporate debt securities		-		150,304		-		150,304
Mutual funds		5,725		-		-		5,725
Preferred stock of government sponsored entities		-		11,403		-		11,403
Total securities available-for-sale		465,918		1,120,750		-		1,586,668
Trading securities		-		4,936		-		4,936
Warrants		-		-		30		30
Option contracts		-		-		-		-
Foreign exchange contracts		-		6,182		-		6,182
Total assets	$	465,918	$	1,131,868	$	30	$	1,597,816
Liabilities
Foreign exchange contracts		-		6,140		-		6,140
Total liabilities	$	-	$	6,140	$	-	$	6,140

Fair Value Measurements, Nonrecurring [Table Text Block]

	As of December 31, 2014								Total Losses/(Gains)
	Fair Value Measurements Using								For the Twelve Months Ended
	Level 1		Level 2		Level 3		Total at Fair Value		December 31, 2014		December 31, 2013
	(In thousands)
Assets
Impaired loans by type:
Commercial loans	$	-	$	-	$	3,774	$	3,774	$	17	$	5,731
Commercial mortgage loans		-		-		25,029		25,029		3,914		125
Construction- residential		-		-		-		-		-		-
Construction- other		-		-		7,625		7,625		-		-
Residential mortgage and equity lines		-		-		13,126		13,126		27		213
Land loans		-		-		-		-		-		-
Total impaired loans		-		-		49,554		49,554		3,958		6,069
Other real estate owned (1)		-		16,458		4,110		20,568		202		(3,134	)
Investments in venture capital and private company stock		-		-		5,495		5,495		436		409
Equity investments				-		617		617		-		-
Total assets	$	-	$	16,458	$	59,776	$	76,234	$	4,596	$	3,344

	As of December 31, 2013								Total Losses
	Fair Value Measurements Using								For the Twelve Months Ended
	Level 1		Level 2		Level 3		Total at Fair Value		December 31, 2013			December 31, 2012
	(In thousands)
Assets
Impaired loans by type:
Commercial loans	$	-	$	-	$	7,584	$	7,584	$	5,731		$	-
Commercial mortgage loans		-		-		29,001		29,001		125			440
Construction- residential		-		-		500		500		-			-
Construction- other		-		-		15,363		15,363		-			65
Residential mortgage and equity lines		-		-		14,236		14,236		213			605
Land loans		-		-		29		29		-			162
Total impaired loans		-		-		66,713		66,713		6,069			1,272
Other real estate owned (1)		-		13,248		26,498		39,746		(3,134	)		10,904
Investments in venture capital and private company stock		-		-		8,900		8,900		409			309
Equity investments		642		-		-		642		-			181
Total assets	$	642	$	13,248	$	102,111	$	116,001	$	3,344		$	12,666