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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of plan assets and benefit obligation activity
Using an accrual measurement date of December 31, 2016 and 2015, plan assets and benefit obligation activity for the Pension Plan are listed below:

(In thousands)
 
2016
 
2015
Change in fair value of plan assets
 
 
 
 
Fair value at beginning of measurement period
 
$
153,498

 
$
160,598

Actual return on plan assets
 
19,256

 
(58
)
Benefits paid
 
(5,707
)
 
(7,042
)
Fair value at end of measurement period
 
$
167,047

 
$
153,498

Change in benefit obligation
 
 
 
 
Projected benefit obligation at beginning of measurement period
 
$
102,245

 
$
109,328

Service cost
 
5,055

 
5,368

Interest cost
 
4,869

 
4,695

Actuarial loss (gains)
 
7,993

 
(10,104
)
Benefits paid
 
(5,707
)
 
(7,042
)
Projected benefit obligation at the end of measurement period
 
$
114,455

 
$
102,245

Funded status at end of year (fair value of plan assets less benefit obligation)
 
$
52,592

 
$
51,253
Schedule of allocation of plan assets
The asset allocation for the Pension Plan as of each measurement date, by asset category, was as follows:
 
 
 
 
 
Percentage of Plan Assets
Asset category
 
Target Allocation
 
2016
 
2015
Equity securities
 
50% - 100%
 
84
%
 
85
%
Fixed income and cash equivalents
 
remaining balance
 
16
%
 
15
%
Total
 
 
 
100
%
 
100
%
Schedule of assumptions used to determine benefit obligations
The weighted average assumptions used to determine benefit obligations at December 31, 2016, 2015 and 2014 were as follows:
 
 
 
2016
 
2015
 
2014
Discount rate
 
4.58
%
 
4.88
%
 
4.42
%
Rate of compensation increase
 
 
 


 

Under age 30
 
10.00
%
 
10.00
%
 
10.00
%
Ages 30-39
 
6.00
%
 
6.00
%
 
6.00
%
Ages 40-49
 
4.00
%
 
3.00
%
 
3.00
%
Ages 50 and over
 
3.00
%
 
3.00
%
 
3.00
%
Schedule of estimated future pension benefit Payments
The estimated future pension benefit payments reflecting expected future service for the next ten years are shown below (in thousands):

2017
$
6,924

2018
7,644

2019
7,875

2020
8,393

2021
9,503

2022-2026
48,058

Total
$
88,397
Schedule of balances of accumulated other comprehensive income loss
The following table shows ending balances of accumulated other comprehensive loss at December 31, 2016 and 2015.
 
(In thousands)
 
2016
 
2015
Prior service cost
 
$
—

 
$
—

Net actuarial loss
 
(22,677
)
 
(23,618
)
Total
 
(22,677
)
 
(23,618
)
Deferred taxes
 
7,937

 
8,267

Accumulated other comprehensive loss
 
$
(14,740
)
 
$
(15,351
)
Schedule of components of net periodic benefit cost and other amounts recognized in other comprehensive income (loss)
Using an actuarial measurement date of December 31 for 2016, 2015 and 2014, components of net periodic benefit income and other amounts recognized in other comprehensive income (loss) were as follows:
 
(In thousands)
 
2016
 
2015
 
2014
Components of net periodic benefit income and other amounts recognized in other comprehensive income
 
 
 
 
 
 
Service cost
 
$
(5,055
)
 
$
(5,368
)
 
$
(4,331
)
Interest cost
 
(4,869
)
 
(4,695
)
 
(4,577
)
Expected return on plan assets
 
10,950

 
11,420

 
10,869

Amortization of prior service cost
 
—

 
(15
)
 
(19
)
Recognized net actuarial loss
 
(773
)
 
(637
)
 
—

Net periodic benefit income
 
$
253

 
$
705

 
$
1,942

Change to net actuarial gain (loss) for the period
 
$
168

 
$
(1,400
)
 
$
(14,276
)
Amortization of prior service cost
 
—

 
15

 
19

Amortization of net loss
 
773

 
637

 
—

Total recognized in other comprehensive income (loss)
 
941

 
(748
)
 
(14,257
)
Total recognized in net benefit income and other comprehensive income (loss)
 
$
1,194

 
$
(43
)
 
$
(12,315
)
Schedule of assumptions used to determine costs
The weighted average assumptions used to determine net periodic benefit cost for the years ended December 31, 2016, 2015 and 2014 are listed below:
 
 
 
2016
 
2015
 
2014
Discount Rate
 
4.88
%
 
4.42
%
 
5.30
%
Rate of compensation increase
 


 


 


     Under age 30
 
10.00
%
 
10.00
%
 
10.00
%
     Ages 30-39
 
6.00
%
 
6.00
%
 
6.00
%
     Ages 40 and over
 
3.00
%
 
3.00
%
 
3.00
%
Expected long-term return on plan assets
 
7.25
%
 
7.25
%
 
7.25
%