| Pension and Other Retirement Plans [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Pension and Other Retirement Plans [Abstract] | |
Schedule of Defined Benefit Plans Disclosures |
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2016
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2015
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|
Change in Projected Benefit Obligation
|
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|
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|
Projected benefit obligation at beginning of year
|
|
$
|
262,027
|
|
$
|
396,656
|
|
Interest cost
|
|
|
10,098
|
|
|
14,161
|
|
Actuarial (gain) loss
|
|
|
1,368
|
|
|
(27,307)
|
|
Benefit payments
|
|
|
(14,468)
|
|
|
(121,483)
|
|
Projected benefit obligation at end of year
|
|
|
259,025
|
|
|
262,027
|
|
Change in Plan Assets
|
|
|
|
|
|
|
|
Fair value of plan assets at beginning of year
|
|
|
204,581
|
|
|
330,797
|
|
Return on plan assets
|
|
|
14,069
|
|
|
(4,733)
|
|
Benefit payments
|
|
|
(14,468)
|
|
|
(121,483)
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|
Fair value of plan assets at end of year
|
|
|
204,182
|
|
|
204,581
|
|
Funded Status
|
|
$
|
(54,843)
|
|
$
|
(57,446)
|
|
Amounts Recorded on the Balance Sheet
|
|
|
|
|
|
|
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Noncurrent liability - accrued benefit cost
|
|
$
|
54,843
|
|
$
|
57,446
|
|
Accumulated Benefit Obligation
|
|
$
|
259,025
|
|
$
|
262,027
|
|
Schedule of Net Periodic Pension Expense |
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Years Ended December 31,
|
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2016
|
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2015
|
|
2014
|
|
Interest cost
|
|
$
|
10,098
|
|
$
|
14,161
|
|
$
|
17,320
|
|
Expected return on plans' assets
|
|
|
(13,585)
|
|
|
(20,033)
|
|
|
(20,859)
|
|
Amortization of actuarial loss
|
|
|
45
|
|
|
1,252
|
|
|
—
|
|
Recognized settlement loss
|
|
|
—
|
|
|
14,964
|
|
|
7,648
|
|
Net periodic pension expense (benefit)
|
|
$
|
(3,442)
|
|
$
|
10,344
|
|
$
|
4,109
|
|
Schedule of Fair Value and Allocation of Plan Assets |
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Fair Value Measurements Using
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Total
|
|
Quoted Price in
Active Markets
for Identical Assets
(Level I)
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Significant Other
Observable Inputs
(Level II)
|
|
Significant
Unobservable
Inputs
(Level III)
|
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Description
|
|
2016
|
|
2015
|
|
2016
|
|
2015
|
|
2016
|
|
2015
|
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2016
|
|
2015
|
|
Cash and Money Market Funds
|
|
$
|
1,865
|
|
$
|
4,178
|
|
$
|
1,865
|
|
$
|
4,178
|
|
$
|
—
|
|
$
|
—
|
|
$
|
—
|
|
$
|
—
|
|
Equity Funds
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
U.S. equity securities
|
|
|
58,645
|
|
|
62,314
|
|
|
—
|
|
|
—
|
|
|
58,645
|
|
|
62,314
|
|
|
—
|
|
|
—
|
|
International equity securities
|
|
|
32,079
|
|
|
28,669
|
|
|
10,824
|
|
|
4,334
|
|
|
21,255
|
|
|
24,335
|
|
|
—
|
|
|
—
|
|
Fixed Income Funds
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
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Domestic corporate and government debt securities
|
|
|
52,136
|
|
|
54,427
|
|
|
—
|
|
|
—
|
|
|
52,136
|
|
|
54,427
|
|
|
—
|
|
|
—
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Domestic corporate debt securities
|
|
|
51,768
|
|
|
49,074
|
|
|
—
|
|
|
—
|
|
|
51,768
|
|
|
49,074
|
|
|
—
|
|
|
—
|
|
International corporate and government debt securities
|
|
|
7,689
|
|
|
5,919
|
|
|
—
|
|
|
—
|
|
|
7,689
|
|
|
5,919
|
|
|
—
|
|
|
—
|
|
Total
|
|
$
|
204,182
|
|
$
|
204,581
|
|
$
|
12,689
|
|
$
|
8,512
|
|
$
|
191,493
|
|
$
|
196,069
|
|
$
|
—
|
|
$
|
—
|
|
Schedule of Expected Benefit Payments |
|
|
|
|
|
|
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|
Payment year
|
|
Expected
Benefit
Payments
|
|
2017
|
|
$
|
15,859
|
|
2018
|
|
|
16,030
|
|
2019
|
|
|
16,100
|
|
2020
|
|
|
16,043
|
|
2021
|
|
|
16,039
|
|
2022 - 2026
|
|
|
79,266
|
|