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Note 2 - Investment Securities (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Marketable Securities [Table Text Block]
March 31, 2016
                       
 
 
Amortized Cost
 
 
Gross Unrealized Gains
 
 
Gross Unrealized Losses
 
 
Fair Value
 
Securities Available for Sale:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U. S. Government Agencies
                               
Mortgage-Backed
 
$
305,385
 
 
$
1,058
 
 
$
(2,633
)
 
$
303,810
 
State, County & Municipal
 
 
4,975
 
 
 
74
 
 
 
(19
)
 
 
5,030
 
 
 
$
310,360
 
 
$
1,132
 
 
$
(2,652
)
 
$
308,840
 
December 31, 2015
                       
 
 
Amortized Cost
 
 
Gross Unrealized Gains
 
 
Gross Unrealized Losses
 
 
Fair Value
 
Securities Available for Sale:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U. S. Government Agencies
                               
Mortgage-Backed
  $ 297,779     $ 63     $ (6,792 )   $ 291,050  
State, County & Municipal
    5,089       30       (20 )     5,099  
    $ 302,868     $ 93     $ (6,812 )   $ 296,149  
Investments Classified by Contractual Maturity Date [Table Text Block]
 
 
Securities
 
 
 
Available for Sale
 
 
 
Amortized Cost
 
 
Fair Value
 
                 
Due In One Year or Less
 
$
330
 
 
$
331
 
Due After One Year Through Five Years
 
 
1,480
 
 
 
1,473
 
Due After Five Years Through Ten Years
 
 
1,671
 
 
 
1,717
 
Due After Ten Years
 
 
1,494
 
 
 
1,509
 
 
 
$
4,975
 
 
$
5,030
 
                 
Mortgage-Backed Securities
 
 
305,385
 
 
 
303,810
 
 
 
$
310,360
 
 
$
308,840
 
Schedule of Unrealized Loss on Investments [Table Text Block]
 
 
Less Than 12 Months
 
 
12 Months or Greater
 
 
Total
 
                                                 
 
 
 
 
 
 
Gross
 
 
 
 
 
 
Gross
 
 
 
 
 
 
Gross
 
 
 
Fair
 
 
Unrealized
 
 
Fair
 
 
Unrealized
 
 
Fair
 
 
Unrealized
 
 
 
Value
 
 
Losses
 
 
Value
 
 
Losses
 
 
Value
 
 
Losses
 
                                                 
March 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Government Agencies
                                               
Mortgage-Backed
 
$
37,615
 
 
$
(202
)
 
$
126,577
 
 
$
(2,431
)
 
$
164,192
 
 
$
(2,633
)
State, County and Municipal
 
 
701
 
 
 
(12
)
 
 
249
 
 
 
(7
)
 
 
950
 
 
 
(19
)
 
 
$
38,316
 
 
$
(214
)
 
$
126,826
 
 
$
(2,438
)
 
$
165,142
 
 
$
(2,652
)
                                                 
December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Government Agencies
                                               
Mortgage-Backed
  $ 139,765     $ (1,270 )   $ 139,720     $ (5,522 )   $ 279,485     $ (6,792 )
State, County and Municipal
    1,035       (20 )     -       -       1,035       (20 )
    $ 140,800     $ (1,290 )   $ 139,720     $ (5,522 )   $ 280,520     $ (6,812 )