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Employee Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The status of the Company’s plan at December 31, 2018, 2017, and 2016:
 
 
Post-Employment Benefit Plan
 
 
 
December 31,
 
 
 
2018
 
2017
 
2016
 
Change in benefit obligation:
 
 
 
 
 
 
 
Beginning of year
 
$
3,604

 
$
4,106

 
$
4,681

 
Service cost
 
22

 
25

 
36

 
Interest cost
 
100

 
122

 
142

 
Actuarial gain
 
(196
)
 
(261
)
 
(297
)
 
Benefits paid
 
(421
)
 
(388
)
 
(456
)
 
Other
 
(47
)
 

 

 
Benefit obligation at end of year
 
$
3,062

 
$
3,604


$
4,106

 


Schedule of Assumptions Used
Assumptions used to determine accumulated benefit obligations as of year end:
 
 
 
Post-Employment Benefit Plan
 
 
 
Year Ended December 31,
 
 
 
2018
 
2017
 
Discount rate
 
3.67%
 
2.96%
 
Measurement date
 
December 31,
2018
 
December 31,
2017
 

Assumptions used to determine net benefit cost (credit) for 2018, 2017, and 2016:
 
 
Post-Employment Benefit Plan
 
 
Year Ended December 31,
 
 
2018
 
2017
 
2016
 
Discount rate
 
2.96
%
 
3.15
%
 
3.20
%
 
Average compensation increase
 
N/A

 
N/A

 
N/A

 

Schedule of Net Benefit Costs
Components of net benefit cost (credit):
 
 
Post-Employment Benefit Plan
 
 
 
Year Ended December 31,
 
 
 
2018
 
2017
 
2016
 
Service cost
 
$
22

 
$
25

 
$
36

 
Interest cost
 
100

 
122

 
142

 
Amortization of unrecognized prior service cost
 
(37
)
 
(339
)
 
(338
)
 
Amortization of unrecognized net actuarial loss
 
92

 
184

 
269

 
Net benefit cost (credit)
 
$
177

 
$
(8
)

$
109

 

The estimated amount that will be recognized from accumulated other comprehensive income (loss) into net periodic benefit cost during 2019:
 
 
Post-Employment Benefit Plan
 
Actuarial net loss
$
(23
)
 
Net prior service credits
15

 
Net amount recognized
$
(8
)
 
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)
Changes in plan assets and benefit obligations recognized in accumulated other comprehensive loss in the Consolidated Balance Sheets:
 
 
Post-Employment Benefit Plan
 
 
 
Year Ended December 31,
 
 
 
2018
 
2017
 
2016
 
Net actuarial gain
 
$
196

 
$
261

 
$
293

 
Amortization of unrecognized net actuarial loss
 
92

 
184

 
269

 
Amortization of unrecognized prior service cost
 
(37
)
 
(339
)
 
(338
)
 
Stranded tax effects from the Tax Act and Other
 
(78
)
 

 

 
Other
 
47

 

 

 
Total other comprehensive income, pre-tax
 
220

 
106


224

 
    Income tax expense
 
73

 
40

 
90

 
Total other comprehensive income, net of tax

$
147

 
$
66


$
134

 

Schedule of Amounts Recognized in Balance Sheet
Benefit obligation recognized in the Consolidated Balance Sheets:
 
 
Post-Employment Benefit Plan
 
 
 
As of December 31,
 
Benefit obligation
 
2018
 
2017
 
Current
 
$
(467
)
 
$
(471
)
 
Non-Current
 
(2,595
)
 
(3,133
)
 
Net amount recognized
 
$
(3,062
)
 
$
(3,604
)
 
Schedule of Health Care Cost Trend Rates
The assumed average annual rate of increase in the per capita cost of covered benefits (health care cost trend rate):
 
 
Post-Employment Benefit Plan
 
 
Year Ended December 31,
 
 
2018
 
2017
 
 
Group Plan
 
Lifetime Prescription Cost
 
Medicare Supplement
 
Group Plan
 
Lifetime Prescription Cost
 
Medicare Supplement
 
Health care cost trend rate
7.00
%
 
9.00
%
 
4.50
%
 
7.00
%
 
9.00
%
 
4.50
%
 
Ultimate trend rate
5.00
%
 
5.00
%
 
4.50
%
 
5.00
%
 
5.00
%
 
4.50
%
 
Year rate reaches ultimate trend rate
2025

 
2027

 
2019

 
2025

 
2027

 
2018

 

Schedule of Expected Benefit Payments
As of December 31, 2018, the following expected benefit payments (net of Medicare Part D subsidiary for Post-Employment Benefit Plan Payments) and the related expected subsidy receipts that reflect expected future service, as appropriate, are expected to be paid to plan participants:
 
 
Post-Employment Benefit Plan
 
 
Expected Benefit
Payments
 
Expected Subsidy
Receipts
 
2019
$
484

 
$
17

 
2020
468

 
15

 
2021
438

 
14

 
2022
426

 
13

 
2023
376

 
11

 
2024-2028
961

 
34

 
Total
$
3,153

 
$
104

 
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
 Summary of unvested RSUs under the Company’s share-based compensation plans for 2018, 2017, and 2016
 
Year Ended December 31,
 
 
2018
 
2017
 
2016
 
 
Units
 
Weighted Average
 Grant-Date Fair
Value
 
Units
 
Weighted Average
 Grant-Date Fair
Value
 
Units
 
Weighted Average
 Grant-Date Fair
Value
 
Unvested balance at beginning of year
368,492

 
$
17.20

 
527,486

 
$
10.17

 
437,946

 
$
7.09

 
Granted
42,136

 
78.37

 
47,514

 
42.93

 
100,892

 
23.15

 
Forfeited
(1,080
)
 
28.30

 
(3,508
)
 
25.74

 
(11,352
)
 
11.55

 
Vested
(80,343
)
 
15.42

 
(203,000
)
 
4.82

 

 

 
Unvested balance at end of year
329,205

 
$
25.42

 
368,492

 
$
17.20

 
527,486

 
$
10.17