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Retirement Plans (Tables)
3 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [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 statements of income for the three-month periods ended March 31, 2016 and 2015 are as follows (in thousands):
 
 
For the Three Months
Ended March 31,
 
 
2016
 
2015
Qualified noncontributory defined benefit retirement plan
 
$
220

 
270

401(k) plan
 
83

 
87

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 months ended March 31, 2016 and 2015 are summarized as follows (in thousands):
 
 
 
Three Months Ended
March 31,
 
 
 
2016
 
2015
Service cost
 
 
$
10

 
9

Interest cost
 
 
19

 
17

Amortization of unrecognized net loss
 
 
42

 
42

Net periodic pension cost
 
 
$
71

 
68

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, net of tax, at March 31, 2016 and December 31, 2015 for the nonqualified defined benefit retirement plan consists of (in thousands):
 
March 31, 2016
 
December 31,
2015
Net actuarial loss
$
205

 
233