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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Change in the projected benefit obligation, plan assets at fair value and funded status
The change in the Company's postretirement benefit obligation is as follows:
 
Year Ended December 31,
(In thousands)
2015
 
2014
 
2013
Change in Benefit Obligation
 

 
 

 
 

Benefit obligation at beginning of year
$
37,076

 
$
34,995

 
$
40,168

Service cost
1,808

 
1,295

 
1,739

Interest cost
1,448

 
1,343

 
1,500

Actuarial (gain) loss
(2,829
)
 
373

 
(7,618
)
Benefits paid
(877
)
 
(930
)
 
(794
)
Benefit obligation at end of year
$
36,626

 
$
37,076

 
$
34,995

Change in Plan Assets
 

 
 

 
 

Fair value of plan assets at end of year
—

 
—

 
—

Funded status at end of year
$
(36,626
)
 
$
(37,076
)
 
$
(34,995
)
Schedule of amounts recognized in the balance sheet
Amounts recognized in the balance sheet consist of the following:
 
December 31,
(In thousands)
2015
 
2014
 
2013
Current liabilities
$
1,333

 
$
1,249

 
$
1,441

Long-term liabilities
35,293

 
35,827

 
33,554

 
$
36,626

 
$
37,076

 
$
34,995
Schedule of amounts recognized in accumulated other comprehensive income
Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Loss)
 
Year Ended December 31,
(In thousands)
2015
 
2014
 
2013
Components of Net Periodic Postretirement Benefit Cost
 

 
 

 
 

Service cost
$
1,808

 
$
1,295

 
$
1,739

Interest cost
1,448

 
1,343

 
1,500

Amortization of net loss
—

 
(26
)
 
641

Net periodic postretirement cost
$
3,256

 
$
2,612

 
$
3,880

Other Changes in Benefit Obligations Recognized in Other Comprehensive Income (Loss)
 

 
 

 
 

Net gain (loss)
$
(2,829
)
 
$
373

 
$
(7,618
)
Amortization of net (gain) loss
—

 
26

 
(641
)
Total recognized in other comprehensive income
(2,829
)
 
399

 
(8,259
)
Total recognized in net periodic benefit cost and other comprehensive income (loss)
$
427

 
$
3,011

 
$
(4,379
)
Amounts recognized in accumulated other comprehensive income (loss) consist of the following:
 
December 31,
(In thousands)
2015
 
2014
 
2013
Net actuarial loss
$
580

 
$
3,408

 
$
3,010

 
$
580

 
$
3,408

 
$
3,010
Assumptions to determine projected postretirement benefit obligations and postretirement costs
Assumptions used to determine projected postretirement benefit obligations and postretirement costs are as follows:
 
December 31,
 
2015
 
2014
 
2013
Discount rate(1)
4.25
%
 
4.00
%
 
4.75
%
Health care cost trend rate for medical benefits assumed for next year
5.50
%
 
6.00
%
 
6.50
%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)
4.50
%
 
4.50
%
 
4.50
%
Year that the rate reaches the ultimate trend rate
2018

 
2018

 
2018

_______________________________________________________________________________

(1)
Represents the year end rates used to determine the projected benefit obligation. To compute postretirement cost in 2015, 2014 and 2013, respectively, the beginning of year discount rates of 4.00%, 4.75% and 4.00% were used.
Effect of a one-percentage-point change in assumed health care cost trend rates
Assumed health care cost trend rates may have a significant effect on the amounts reported for the health care plans. A one-percentage-point change in assumed health care cost trend rates would have the following effects:
(In thousands)
1-Percentage-Point Increase
 
1-Percentage-Point Decrease
Effect on total of service and interest cost
$
618

 
$
(539
)
Effect on postretirement benefit obligation
5,849

 
(4,718
)
Schedule of estimated benefit payments
The following estimated benefit payments under the Company's postretirement plans, which reflect expected future service, are expected to be paid as follows:
(In thousands)
 
2016
1,361

2017
1,430

2018
1,551

2019
1,718

2020
1,875

Years 2021 - 2025
11,404