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Note 8 - Time Deposits
12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Deposit Liabilities Disclosures [Text Block]
NOTE
8:
TIME DEPOSITS
 
Time deposits included approximately
$735,970,000
and
$600,280,000
of certificates of deposit of
$100,000
or more, at
December 31, 2017
and
2016,
respectively. Of this total approximately
$396,771,000
and
$193,596,000
of certificates of deposit were over
$250,000
at
December 31, 2017
and
2016,
respectively.
 
Brokered time deposits were
$159,586,000
and
$7,040,000
at
December 31, 2017
and
2016,
respectively.  Maturities of all time deposits are as follows:  
2018
$966,158,000;
2019
$660,371,000;
2020
$170,969,000;
2021
$75,599,000;
2022
$59,633,000.
 
Deposits are the Company's primary funding source for loans and investment securities.  The mix and repricing alternatives can significantly affect the cost of this source of funds and, therefore, impact the interest margin.