Note 11 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2 )		Significant Unobservable Inputs (Level 3 )
	(In thousands)
Investment securities available for sale:
At December 31, 2013	$	1,079,381	$	148,670	$	930,711	$	-
At December 31, 2012	$	825,636	$	57,424	$	768,212	$	-

Fair Value Measurements, Nonrecurring [Table Text Block]

	At December 31, 2013
	Fair Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Non-covered other real estate owned	$	5,527	$	-	$	5,527	$	-	$	(787	)
Covered other real estate owned		7,793		-		7,793		-		(27	)
Originated impaired loans		2,605		-		900		1,705		-
Purchased covered impaired loans		7,067		-		7,067		-		(233	)
Total assets measured at fair value on a nonrecurring basis	$	22,992	$	-	$	21,287	$	1,705	$	(1,047	)

	At December 31, 2012
	Fair Value		Level 1		Level 2		Level 3		Total Losses
	(In thousands)
Non-covered other real estate owned	$	6,618	$	-	$	6,618	$	-	$	(1,360	)
Covered other real estate owned		7,929		-		7,929		-		(371	)
Originated impaired loans		5,197		-		3,097		2,100		(3,158	)
Purchased covered impaired loans		6,684		-		2,224		4,460		(83	)
Total assets measured at fair value on a nonrecurring basis	$	26,428	$	-	$	19,868	$	6,560	$	(4,972	)

Fair Value, by Balance Sheet Grouping [Table Text Block]

	At December 31, 2013
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2 )		Significant Unobservable Inputs (Level 3 )
Financial Assets:	(In thousands)
Cash and due from banks	$	472,028	$	472,028	$	472,028	$	-	$	-
Investment securities held to maturity		1,132,299		1,112,676		1,597		1,111,079		-
Loans		1,796,051		1,800,625		-		-		1,800,625
Other assets - FDIC indemnification receivable		4,032		4,032		-		-		4,032
Financial Liabilities:
Deposits	$	4,163,781	$	4,162,935	$	-	$	3,671,014	$	491,921
Short-term borrowed funds		62,668		62,668		-		62,668		-
Federal Home Loan Bank advances		20,577		20,558		20,558		-		-
Term repurchase agreement		10,000		10,054		-		10,054		-

	At December 31, 2012
	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2 )		Significant Unobservable Inputs (Level 3 )
Financial Assets:	(In thousands)
Cash and due from banks	$	491,382	$	491,382	$	491,382	$	-	$	-
Investment securities held to maturity		1,156,041		1,184,557		3,275		1,181,282		-
Loans		2,081,123		2,090,712		-		-		2,090,712
Other assets - FDIC indemnification receivable		13,847		13,834		-		-		13,834
Financial Liabilities:
Deposits	$	4,232,492	$	4,232,239	$	-	$	3,589,921	$	642,318
Short-term borrowed funds		53,687		53,687		-		53,687		-
Federal Home Loan Bank advances		25,799		26,150		26,150		-		-
Term repurchase agreement		10,000		10,135		-		10,135		-
Debt financing		15,000		15,645		-		15,645		-