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EMPLOYEE BENEFIT PLANS (Tables)
 12 Months Ended
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]  
Schedule of changes in benefit obligations, fair value of plan assets, and funded status of plan
The changes in the benefit obligation, the changes in fair value of plan assets, and the funded status of the Company’s Pension and Post Retirement Medical Plans as of and for the years ended December 31, 2013 and 2012 were as follows:
 
 
 
Pension Plans
 
Post Retirement
Medical Plan
 
 
2013
 
2012
 
2013
 
2012
Change in benefit obligation:
 
 
 
 
 
 
 
 
Benefit obligation at beginning of year
 
$
30,215

 
$
11,409

 
$
9,730

 
$
8,912

Service cost
 
14,794

 
11,437

 
726

 
633

Interest cost
 
992

 
502

 
334

 
395

Plan amendments
 
—

 
—

 
(860
)
 
—

Benefit payments
 
(663
)
 
(48
)
 
(51
)
 
(21
)
Actuarial loss (gain)
 
8,012

 
6,916

 
(1,654
)
 
(189
)
Projected benefit obligation at end of year
 
$
53,350

 
$
30,215

 
$
8,225

 
$
9,730

Change in plan assets:
 
 
 
 
 
 
 
 
Fair value of plan assets at beginning of year
 
$
10,232

 
$
4,758

 
$
—

 
$
—

Actual return on plan assets
 
33

 
422

 
—

 
—

Benefits paid
 
(663
)
 
(48
)
 
(51
)
 
(21
)
Employer contributions
 
15,448

 
5,100

 
51

 
21

Fair value of plan assets at end of year
 
$
25,050

 
$
10,232

 
$
—

 
$
—

Reconciliation of funded status:
 
 
 
 
 
 
 
 
Fair value of plan assets at end of year
 
$
25,050

 
$
10,232

 
$
—

 
$
—

Less benefit obligations at end of year
 
53,350

 
30,215

 
8,225

 
9,730

Funded status at end of year
 
$
(28,300
)
 
$
(19,983
)
 
$
(8,225
)
 
$
(9,730
)
Schedule of expected benefit payments
Benefit payments, which reflect expected future services, that the Company expects to pay are as follows for the years ended December 31:
 
 
 
Pension Benefits
 
Post Retirement
Medical Plan
2014
 
$
6,493

 
$
176

2015
 
3,758

 
278

2016
 
4,922

 
329

2017
 
7,123

 
445

2018
 
9,161

 
528

Years 2019-2024
 
58,480

 
4,330
Schedule of net periodic benefit cost
The components of net periodic benefit cost were as follows for the years ended December 31, 2013, 2012 and 2011:
 
 
 
Pension Benefits
 
Post Retirement
Medical Plan
 
 
2013
 
2012
 
2011
 
2013
 
2012
 
2011
Components of net period benefit cost:
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
14,794

 
$
11,437

 
$
8,678

 
$
726

 
$
633

 
$
540

Interest cost
 
992

 
502

 
140

 
334

 
395

 
381

Expected return on plan assets
 
(550
)
 
(323
)
 
(38
)
 
—

 
—

 
—

Amortization of prior service cost
 
11

 
11

 
11

 
—

 
—

 
—

Amortization of actuarial loss
 
421

 
30

 
56

 
—

 
—

 
—

Net periodic benefit cost
 
$
15,668

 
$
11,657

 
$
8,847

 
$
1,060

 
$
1,028

 
$
921
Schedule of pre-tax amounts recognized in other comprehensive income (loss)
The pre-tax amounts recognized in other comprehensive income (loss) for the years ended December 31, 2013, 2012 and 2011 were as follows:
 
 
 
Pension Benefits
 
Post Retirement
Medical Plan
 
 
2013
 
2012
 
2011
 
2013
 
2012
 
2011
Prior service costs (credits)
 
$
—

 
$
—

 
$
—

 
$
(860
)
 
$
—

 
$
—

Net actuarial loss (gain)
 
8,235

 
6,817

 
661

 
(1,654
)
 
(189
)
 
738

Amortization of losses and prior service cost
 
(432
)
 
(41
)
 
(67
)
 
—

 
—

 
—

Total changes in other comprehensive loss (income)
 
$
7,803

 
$
6,776

 
$
594

 
$
(2,514
)
 
$
(189
)
 
$
738
Schedule of pre-tax amounts in accumulated other comprehensive loss not yet recognized as components of net periodic costs
The pre-tax amounts in accumulated other comprehensive loss as of December 31, 2013 and 2012 that have not yet been recognized as components of net periodic costs were as follows:
 
 
 
Pension Benefits
 
Post Retirement
Medical Plan
 
 
2013
 
2012
 
2013
 
2012
Prior service (costs) credits
 
$
(92
)
 
$
(103
)
 
$
860

 
$
—

Net actuarial (loss) gain
 
(16,419
)
 
(8,306
)
 
1,126

 
(528
)
Total
 
$
(16,511
)
 
$
(8,409
)
 
$
1,986

 
$
(528
)
Schedule of pre-tax amounts in accumulated other comprehensive loss to be recognized over next fiscal year
The following pre-tax amounts included in accumulated other comprehensive loss as of December 31, 2013 are expected to be recognized as components of net period benefit cost during the year ended December 31, 2014:
 
 
 
Pension Benefits
 
Post Retirement
Medical Plan
Amortization of prior service costs (credits)
 
$
11

 
$
(81
)
Amortization of net actuarial loss (gain)
 
889

 
(21
)
Total
 
$
900

 
$
(102
)
Schedule of assumptions used
The weighted average assumptions used to determine the benefit obligations as of December 31, 2013 and 2012 were as follows:
 
 
 
Pension Benefits
 
Post Retirement Medical Plan
 
 
2013
 
2012
 
2013
 
2012
Discount rate
 
4.55
%
 
3.45
%
 
4.55
%
 
3.45
%
Rate of compensation increase
 
4.64
%
 
4
%
 
—

 
—

The weighted average assumptions used to determine the net periodic benefit costs for the years ended December 31, 2013, 2012 and 2011 were as follows:
 
 
 
Pension Benefits
 
Post Retirement Medical Plan
 
 
2013
 
2012
 
2011
 
2013
 
2012
 
2011
Discount rate
 
3.45
%
 
4.45
%
 
5.25
%
 
3.45
%
 
4.45
%
 
5.25
%
Expected long-term rate of return on plan assets
 
3.50
%
 
4.25
%
 
4.25
%
 
—

 
—

 
—

Rate of compensation increase
 
4
%
 
4
%
 
4
%
 
—

 
—

 
—
Schedule of assumed health care cost trend rates
The assumed health care cost trend rates as of December 31, 2013 and 2012 were as follows:
 
 
 
Post Retirement
Medical Plan
 
 
2013
 
2012
Health care cost trend rate assumed for next year
 
6.8
%
 
7.0
%
Rate to which the cost trend rate was assumed to decline (the ultimate trend rate)
 
4.5
%
 
4.5
%
Year that the rate reached the ultimate trend rate
 
2027

 
2027
Schedule of effect of one-percentage-point change in assumed health care cost trend rates
Assumed health care costs trend rates have a significant effect on the amounts reported for retiree health care plans. A one percentage-point change in assumed health care costs trend rates would have the following effects on the medical postretirement benefits:
 
 
 
1%
Increase
 
1%
Decrease
Effect on total of service and interest cost components
 
$
159

 
$
(135
)
Effect on accumulated postretirement benefit obligation
 
907

 
(794
)
Schedule of fair value of assets of the Company's Qualified Plan
The tables below present the fair values of the assets of the Company’s Qualified Plan as of December 31, 2013 and 2012 by level of fair value hierarchy. Assets categorized in Level 1 of the hierarchy are measured at fair value using a market approach based on published net asset values of mutual funds. As noted above, the Company’s post retirement medical plan is funded on a pay-as-you-go basis and has no assets.
 
 
 
Fair Value Measurements Using
Quoted Prices in Active Markets
(Level 1)
 
 
December 31,
 
 
2013
 
2012
Equities:
 
 
 
 
Domestic equities
 
$
7,603

 
$
—

Developed international equities
 
3,685

 
—

Emerging market equities
 
1,775

 
—

Global low volatility equities
 
2,132

 
—

Fixed-income
 
9,855

 
—

Government securities:
 
 
 
 
Vanguard Intermediate-Term Treasury Fund
 
—

 
10,232

Cash and cash equivalents
 
—

 
—

Total
 
$
25,050

 
$
10,232