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Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2015
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, 2015 and 2014, plan assets and benefit obligation activity for the Pension Plan are listed below:

(In thousands)
 
2015
 
2014
Change in fair value of plan assets
 
 
 
 
Fair value at beginning of measurement period
 
$
160,598

 
$
152,739

Actual return on plan assets
 
(58
)
 
15,511

Benefits paid
 
(7,042
)
 
(7,652
)
Fair value at end of measurement period
 
$
153,498

 
$
160,598

Change in benefit obligation
 
 
 
 
Projected benefit obligation at beginning of measurement period
 
$
109,328

 
$
89,179

Service cost
 
5,368

 
4,331

Interest cost
 
4,695

 
4,577

Actuarial (gains) loss
 
(10,104
)
 
18,893

Benefits paid
 
(7,042
)
 
(7,652
)
Projected benefit obligation at the end of measurement period
 
$
102,245

 
$
109,328

Funded status at end of year (fair value of plan assets less benefit obligation)
 
$
51,253

 
$
51,270
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
 
2015
 
2014
Equity securities
 
50% - 100%
 
85
%
 
85
%
Fixed income and cash equivalents
 
remaining balance
 
15
%
 
15
%
Total
 
 
 
100
%
 
100
%
Schedule of assumptions used to determine benefit obligations
The weighted average assumptions used to determine benefit obligations at December 31, 2015, 2014 and 2013 were as follows:
 
 
 
2015
 
2014
 
2013
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
%
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):

2016
$
5,010

2017
5,321

2018
5,800

2019
6,780

2020
7,317

2021-2025
45,831

Total
$
76,059
Schedule of balances of accumulated other comprehensive income loss
The following table shows ending balances of accumulated other comprehensive loss at December 31, 2015 and 2014.
 
(In thousands)
 
2015
 
2014
Prior service cost
 
$
—

 
$
(15
)
Net actuarial loss
 
(23,618
)
 
(22,855
)
Total
 
(23,618
)
 
(22,870
)
Deferred taxes
 
8,267

 
8,005

Accumulated other comprehensive loss
 
$
(15,351
)
 
$
(14,865
)
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 2015, 2014 and 2013, components of net periodic benefit cost and other amounts recognized in other comprehensive (loss) income were as follows:
 
(In thousands)
 
2015
 
2014
 
2013
Components of net periodic benefit cost and other amounts recognized in other comprehensive (loss) income
 
 
 
 
 
 
Service cost
 
$
(5,368
)
 
$
(4,331
)
 
$
(4,817
)
Interest cost
 
(4,695
)
 
(4,577
)
 
(4,223
)
Expected return on plan assets
 
11,420

 
10,869

 
9,536

Amortization of prior service cost
 
(15
)
 
(19
)
 
(20
)
Recognized net actuarial loss
 
(637
)
 
—

 
(2,703
)
Net periodic benefit income (cost)
 
$
705

 
$
1,942

 
$
(2,227
)
Change to net actuarial (loss) gain for the period
 
$
(1,400
)
 
$
(14,276
)
 
$
30,409

Amortization of prior service cost
 
15

 
19

 
20

Amortization of net loss
 
637

 
—

 
2,703

Total recognized in other comprehensive (loss) income
 
(748
)
 
(14,257
)
 
33,132

Total recognized in net benefit cost and other comprehensive (loss) income
 
$
(43
)
 
$
(12,315
)
 
$
30,905
Schedule of assumptions used to determine costs
The weighted average assumptions used to determine net periodic benefit cost for the years ended December 31, 2015, 2014 and 2013 are listed below:
 
 
 
2015
 
2014
 
2013
Discount Rate
 
4.42
%
 
5.30
%
 
4.47
%
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
%
 
7.50
%