Note 11 - Deposits (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Deposit Composition And Interest Rate [Table Text Block]

	2016					2015					2014
(dollars in thousands)			Average					Average					Average
	Balance		Rate			Balance		Rate			Balance		Rate
Noninterest bearing demand	$	1,775,684		-		$	1,405,067		-		$	1,175,799		-
Interest bearing transaction		289,122		0.16	%		178,797		0.16	%		143,628		0.13	%
Savings and money market		2,902,560		0.54	%		2,835,325		0.34	%		2,302,600		0.32	%
Time, $100,000 or more		464,842		0.95	%		406,570		0.77	%		393,132		0.68	%
Other time		283,906		0.86	%		332,685		0.74	%		295,609		0.70	%
Total	$	5,716,114				$	5,158,444				$	4,310,768

Investments Classified by Contractual Maturity Date [Table Text Block]

(dollars in thousands)	2016		2015		2014
Three months or less	$	120,238	$	88,483	$	104,482
More than three months through six months		151,422		123,789		106,861
More than six months through twelve months		207,141		234,684		182,187
Over twelve months		269,947		292,299		295,211
Total	$	748,748	$	739,255	$	688,741

Interest Expense On Deposits [Table Text Block]

(dollars in thousands)	2016		2015		2014
Interest bearing transaction	$	646	$	291	$	178
Savings and money market		12,038		8,185		6,265
Time, $100,000 or more		6,487		5,019		2,830
Other time		77		848		365
Total	$	19,248	$	14,343	$	9,638