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Retirement Plans (Tables)
9 Months Ended
Sep. 30, 2017
Retirement Benefits [Abstract]  
Summary of Funding and Administrative Cost of Qualified Noncontributory Defined Benefit Retirement Plan and 401(k) Plan Charged to Salaries and Employee Benefits
Funding and administrative costs of the qualified noncontributory defined benefit retirement plan and 401(k) plan charged to pension and other employee benefits in the consolidated condensed statements of income for the three and nine-month periods ended September 30, 2017 and 2016 are as follows (in thousands):
 
For the Three Months
Ended September 30,
 
For the Nine Months
Ended September 30,
 
2017
 
2016
 
2017
 
2016
Qualified noncontributory defined benefit retirement plan
$
267

 
272

 
$
789

 
$
712

401(k) plan
102

 
81

 
298

 
241

Components of Net Periodic Pension Cost of Nonqualified Defined Benefit Retirement Plan
The components of net periodic pension cost of the nonqualified defined benefit retirement plan for the three and nine months ended September 30, 2017 and 2016 are summarized as follows (in thousands):
 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2017
 
2016
 
2017
 
2016
Service cost
 
$

 
10

 
$

 
$
30

Interest cost
 
17

 
20

 
51

 
58

Amortization of unrecognized net loss
 

 
42

 

 
126

Net periodic pension cost
 
$
17

 
72

 
$
51

 
$
214

Amount Recognized in Accumulated Other Comprehensive Income, Net of Deferred Federal Income Taxes for Nonqualified Defined Retirement Plan
Amounts recognized in accumulated other comprehensive income (loss), net of tax, at September 30, 2017 and December 31, 2016 for the nonqualified defined benefit retirement plan consists of (in thousands):
 
September 30, 2017
 
December 31, 2016
Net actuarial (gain) loss
$
(16
)
 
$
(16
)
Past service cost

 

  Total recognized in accumulated other comprehensive income (loss), net of tax
$
(16
)
 
$
(16
)