Note 11 - Fair Value Measurements (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2014

Dec. 31, 2013

Disclosure Text Block [Abstract]

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

September 30, 2014	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	$	540,088	$	-	$	-	$	540,088
Mortgage-backed securities		-		683,324		-		683,324
Collateralized mortgage obligations		-		46		-		46
Corporate debt securities		-		94,337		-		94,337
Mutual funds		5,817		-		-		5,817
Preferred stock of government sponsored entities		-		9,252		-		9,252
Other equity securities		7,228		-		-		7,228
Total securities available-for-sale		553,133		786,959		-		1,340,092
Warrants		-		-		12		12
Interest rate swaps		-		442		-		442
Foreign exchange contracts		-		1,936		-		1,936
Total assets	$	553,133	$	789,337	$	12	$	1,342,482
Liabilities
Interest rate swaps	$	-	$	280	$	-	$	280
Foreign exchange contracts		-		4,437		-		4,437
Total liabilities	$	-	$	4,717	$	-	$	4,717

December 31, 2013	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	$	460,193	$	-	$	-	$	460,193
Mortgage-backed securities		-		952,815		-		952,815
Collateralized mortgage obligations		-		6,106		-		6,106
Asset-backed securities		-		123		-		123
Corporate debt securities		-		150,304		-		150,304
Mutual funds		5,724		-		-		5,724
Preferred stock of government sponsored entities		-		11,403		-		11,403
Total securities available-for-sale		465,917		1,120,751		-		1,586,668
Trading securities		-		4,936		-		4,936
Warrants		-		-		30		30
Foreign exchange contracts		-		6,182		-		6,182
Total assets	$	465,917	$	1,131,869	$	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]

	September 30, 2014								Total Losses / (Gains)
	Fair Value Measurements Using						Total at		Three Months Ended					Nine Months Ended
	Level 1		Level 2		Level 3		Fair Value		September 30, 2014			September 30, 2013		September 30, 2014		September 30, 2013
	(In thousands)
Assets
Impaired loans by type:
Commercial loans	$	-	$	-	$	4,255	$	4,255	$	-		$	-	$	17	$	536
Commercial mortgage loans		-		-		24,974		24,974		515			394		515		459
Construction loans		-		-		12,773		12,773		-			-		-		-
Residential mortgage loans and equity lines		-		-		12,507		12,507		32			160		32		191
Total impaired loans		-		-		54,509		54,509		547			554		564		1,186
Other real estate owned (1)		-		14,340		4,110		18,450		(48	)		111		277		(1,267	)
Investments in venture capital		-		-		5,698		5,698		49			84		317		295
Total assets	$	-	$	14,340	$	64,317	$	78,657	$	548		$	749	$	1,158	$	214

	December 31, 2013								Total Losses / (Gains)
	Fair Value Measurements Using						Total at		Twelve Months Ended
	Level 1		Level 2		Level 3		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 loans 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		-		-		8,900		8,900		409			309
Equity investments		642		-		-		642		-			181
Total assets	$	642	$	13,248	$	102,111	$	116,001	$	3,344		$	12,666