Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Changes in Projected Benefit Obligations

The following tables set forth the change in the projected benefit obligation and plan assets and reconcile the funded status and the amounts recognized in the Consolidated Balance Sheets for the pension and postretirement benefit plans for the two years ended December 31:

	Pension						Postretirement
	2013			2012			2013			2012
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year	$	454,470		$	413,147		$	27,582		$	24,833
Service cost	8,452			8,407			1,056			918
Interest cost	16,682			17,284			937			956
Settlement loss	137			—			—			—
Actuarial (gain) loss	(44,786		)	32,666			(3,206		)	2,021
Plan amendments	—			—			(3,372		)	—
Employee contributions	—			—			980			1,136
Benefits paid	(21,317		)	(17,034		)	(1,978		)	(2,282		)
Projected benefit obligation at end of year	$	413,638		$	454,470		$	21,999		$	27,582

Schedule of Changes in Fair Value of Plan Assets

Change in Plan Assets
Fair value of plan assets at beginning of year	$	320,699		$	295,655		$	—		$	—
Actual return on plan assets	42,285			41,729			—			—
Employer contributions	1,699			1,565			998			1,146
Employee contributions	—			—			980			1,136
Benefits paid	(21,317		)	(17,034		)	(1,978		)	(2,282		)
Other expense	(1,461		)	(1,216		)	—			—
Fair value of plan assets at end of year	$	341,905		$	320,699		$	—		$	—

Funded Status at End of Year:
Net accrued benefit cost	$	(71,733	)	$	(133,771	)	$	(21,999	)	$	(27,582	)

Schedule of Net Funded Status

Funded Status at End of Year:
Net accrued benefit cost	$	(71,733	)	$	(133,771	)	$	(21,999	)	$	(27,582	)

Schedule of Amounts Recognized in Balance Sheet

Amounts Recognized in the Consolidated
Balance Sheets Consist of:
Noncurrent assets	$	3,583		$	—		$	—		$	—
Current liabilities	(1,776		)	(1,702		)	(1,071		)	(1,256		)
Noncurrent liabilities	(73,540		)	(132,069		)	(20,928		)	(26,326		)
Net amount recognized	$	(71,733	)	$	(133,771	)	$	(21,999	)	$	(27,582	)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

Net gains or losses and prior service costs or credits reclassified from other comprehensive income and recognized as a component of pension and postretirement expense for the three years ended December 31 are as follows:

	Pension						Postretirement
	2013		2012		2011		2013			2012			2011
Amortization of losses	$	20,914	$	17,578	$	10,372	$	675		$	582		$	570
Amortization of prior service cost	1,356		1,308		1,359		66			80			69
Amortization of negative plan amendment	—		—		—		(105		)	(55		)	—

Net gains or losses, prior service costs or credits and plan amendment gains recognized in other comprehensive income for the three years ended December 31 are as follows:

	Pension								Postretirement
	2013		2012			2011			2013		2012			2011
Net gains (losses)	$	60,171	$	(17,630	)	$	(75,995	)	$	3,206	$	(2,021	)	$	(3,934	)
Prior service cost	—		—			—			—		—			631
Negative plan amendment	—		—			—			3,372		—			—

Schedule of Net Periodic Benefit Cost Not yet Recognized

Net losses and prior service costs or credits that have not yet been included in pension and postretirement expense for the two years ended December 31, which have been recognized as a component of AOCI are as follows:

	Pension						Postretirement
	2013			2012			2013			2012
Prior service cost	$	(5,707	)	$	(7,062	)	$	(49	)	$	(328	)
Net losses	(110,728		)	(191,813		)	(8,057		)	(11,939		)
Negative plan amendment	—			—			3,574			521
Deferred income tax benefit	36,685			61,968			1,571			4,073
AOCI	$	(79,750	)	$	(136,907	)	$	(2,961	)	$	(7,673	)

Schedule of Projected Benefit Obligation and Accumulated Benefit Obligation in Excess of Fair Value

For pension and postretirement plans with accumulated benefit obligations in excess of plan assets, the following table sets forth the projected and accumulated benefit obligations and the fair value of plan assets for the two years ended December 31:

	2013		2012
Projected benefit obligation	$	388,163	$	482,052
Accumulated benefit obligation	350,605		434,810
Fair value of plan assets	290,848		320,699

Schedule of Net Benefit Costs

The following tables set forth the components of net pension and postretirement benefit cost that have been recognized during the three years ended December 31:

	Pension									Postretirement
	2013			2012			2011			2013			2012			2011
Components of Net Periodic Benefit Cost
Service cost	$	8,452		$	8,407		$	6,782		$	1,056		$	918		$	673
Interest cost	16,682			17,284			18,087			937			956			972
Expected return on plan assets	(25,302		)	(25,477		)	(25,819		)	—			—			—
Amortization of prior service cost	1,296			1,308			1,359			66			80			69
Amortization of losses	20,097			17,578			10,372			675			582			570
Amortization of negative plan amendment	—			—			—			(105		)	(55		)	—
Curtailment expense	60			—			—			—			—			—
Settlement expense	817			—			—			—			—			—
Net periodic benefit cost	$	22,102		$	19,100		$	10,781		$	2,629		$	2,481		$	2,284

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year

The estimated pre-tax amounts that will be amortized from AOCI into net periodic benefit cost in 2014 are as follows:

	Pension		Postretirement
Amortization of loss	$	10,448	$	640
Amortization of prior service cost	1,167		17
Amortization of negative plan amendment	—		(282		)
Total amortization of AOCI loss	$	11,615	$	375

Schedule of Assumptions Used

The following table sets forth the principal assumptions inherent in the determination of benefit obligations and net periodic benefit cost of the pension and postretirement benefit plans as of December 31:

	Pension						Postretirement
	2013		2012		2011		2013		2012		2011
Assumptions used to determine benefit obligations at December 31:
Discount rate	4.60	%	3.70	%	4.20	%	4.60	%	3.60	%	4.10	%
Rate of compensation increase	4.60	%	4.60	%	4.50	%	4.50	%	4.50	%	4.50	%
Assumptions used to determine net periodic benefit cost for years ended December 31:
Discount rate	3.70	%	4.20	%	5.25	%	3.60	%	4.10	%	5.10	%
Expected long-term return on plan assets	8.50	%	8.50	%	8.50	%	—		—		—
Rate of compensation increase	4.60	%	4.50	%	4.50	%	4.50	%	4.50	%	4.50	%

Schedule of Health Care Cost Trend Rates

The following table sets forth the assumed health care cost trend rates at December 31:

	Postretirement
	2013		2012
Health care cost trend rate assumed for next year	7.00	%	7.50	%
Rate to which the cost trend rate is assumed to decline (ultimate trend rate)	5.00	%	5.00	%
Year that the rate reaches the ultimate trend rate	2017		2017

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

The following table shows the effect of a one percentage point change in assumed health care cost trends:

	1 Percent
Effect on:	Increase		Decrease
Total of service and interest cost components	$	253	$	(208	)
Accumulated postretirement benefit obligation	1,389		(1,183		)

Schedule of Allocation of Plan Assets

The following table sets forth by level, within the fair value hierarchy (see Note 2 — Summary of Significant Accounting Policiesfor definition), the assets of the plans as of December 31, 2013 and 2012.

	Fair Value at December 31, 2013						Fair Value at December 31, 2012
Asset Category	Level 1		Level 2		Total		Level 1		Level 2		Total
Domestic equity securities	$	29,293	$	110,401	$	139,694	$	50,653	$	76,251	$	126,904
International equity securities	55,692		31,347		87,039		51,758		27,173		78,931
Domestic fixed income securities	—		85,222		85,222		—		81,045		81,045
International fixed income securities	15,134		—		15,134		15,745		—		15,745
Real estate fund	9,678		—		9,678		10,208		—		10,208
Short-term investments	879		4,259		5,138		29		7,837		7,866
Total	$	110,676	$	231,229	$	341,905	$	128,393	$	192,306	$	320,699

The Company’s pension plans’ asset allocation at December 31, 2013 and 2012, and target allocation ranges by asset category are as follows:

	Percentage of Plan Assets				Target Allocation Range
Asset Category	2013		2012
Domestic equity securities	42	%	41	%	40-45%
International equity securities	26	%	25	%	20-30%
Domestic fixed income securities	25	%	26	%	25-30%
International fixed income securities	4	%	5	%	4-6%
Real estate fund	3	%	3	%	2-4%
Total	100	%	100	%

Schedule of Expected Benefit Payments

Expected benefit payments for the next ten years are as follows:

	Pension Benefits		Postretirement Benefits
2014	$	19,987	$	1,071
2015	21,070		1,170
2016	22,118		1,259
2017	23,149		1,271
2018	24,191		1,394
2019 - 2023	133,459		6,328