Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of change in projected benefit obligation, change in plan assets, funded status and weighted average actuarial assumptions

The change in projected benefit obligation, change in plan assets, funded status and weighted average actuarial assumptions were as follows (dollars in thousands):

	Pension Benefits December 31,						Other Postretirement Benefits December 31,
	2014			2013			2014			2013
Change in projected benefit obligation:
Obligation at beginning of period	$	220,330		$	245,211		$	50,988		$	53,630
Service cost		—			—			897			1,047
Interest cost		8,844			8,344			2,384			2,089
Actuarial (gain) loss		26,643			(16,236	)		7,239			(4,044	)
Benefits paid		(7,312	)		(16,989	)		(1,678	)		(1,734	)

Obligation at end of period		248,505			220,330			59,830			50,988

Change in plan assets:
Fair value of plan assets at beginning of period		188,386			164,426			—			—
Actual return on plan assets		15,562			29,056			—			—
Employer contributions		9,673			11,893			1,678			1,734
Benefits paid		(7,312	)		(16,989	)		(1,678	)		(1,734	)

Fair value of plan assets at end of period		206,309			188,386			—			—

Funded status:
Plan assets less than projected benefit obligation	$	(42,196	)	$	(31,944	)	$	(59,830	)	$	(50,988	)


Amounts recognized on balance sheet:
Other current liabilities	$	—		$	—		$	(2,660	)	$	(2,611	)
Employee benefit obligation, noncurrent		(42,196	)		(31,944	)		(57,170	)		(48,377	)

Net amount recognized	$	(42,196	)	$	(31,944	)	$	(59,830	)	$	(50,988	)


Actuarial gain (loss) recognized in accumulated other comprehensive income (loss)	$	(27,728	)	$	(3,783	)	$	(10,931	)	$	(3,752	)


Actuarial assumptions:
Measurement date		12/31/2014			12/31/2013			12/31/2014			12/31/2013
Discount rate		3.70% to 3.74	%		4.40% to 4.62	%		3.97% to 4.15	%		4.75% to 5.01	%
Assumed health care cost trend rate, current		NA			NA			6.75	%		7.00	%
Assumed health care cost trend rate, ultimate		NA			NA			5.00	%		5.00	%
Assumed health care cost trend rate, ultimate year		NA			NA			2022			2022

Schedule of the fair values of pension plan assets based on trading values or fund net asset value, by asset category

The fair values of the Company's pension plan assets at December 31, 2014 and 2013, based on trading values or fund net asset value, by asset category and basis of valuation, are as follows (dollars in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
2014
Common stocks—domestic large cap	$	18,752	$	—	$	—	$	18,752
Equity funds—large cap index		—		108,189		—		108,189
Fixed income funds—diversified bond		—		78,503		—		78,503
Short term investment funds		—		865		—		865

	$	18,752	$	187,557	$	—	$	206,309


2013
Common stocks—domestic large cap	$	18,658	$	—	$	—	$	18,658
Equity funds—large cap index		—		100,478		—		100,478
Fixed income funds—diversified bond		—		68,242		—		68,242
Short term investment funds		—		1,008		—		1,008

	$	18,658	$	169,728	$	—	$	188,386

Schedule of projected benefit payments

The Company projects that its plans will make the following benefit payments for the years ended December 31 (dollars in thousands):

	Pension Plans Benefits Paid		Other Postretirement Benefits Paid
2015	$	48,966	$	2,712
2016		23,343		2,831
2017		18,827		3,058
2018		18,601		3,324
2019		15,307		3,428
2020 through 2024		68,611		17,777

	$	193,655	$	33,130

Schedule of one-percentage point change in assumed health care cost trend rates

A one-percentage point change in the assumed health care cost trend rates would have the following annual effects (dollars in thousands):

	1-Percentage Point Increase		1-Percentage Point Decrease
Effect on total of service and interest costs components	$	205	$	(169	)
Effect on postretirement benefit obligation		3,840		(3,070	)

Pension Benefits

Employee Benefit Plans

Schedule of components of benefit costs and weighted average actuarial assumptions

	For the Year Ended December 31,
	2014			2013			2012
Service cost	$	—		$	—		$	1,488
Interest cost		8,844			8,344			10,008
Expected asset return		(12,664	)		(11,860	)		(11,491	)
Amortization of net (gain) loss		135			628			429

Total benefit cost (income)	$	(3,685	)	$	(2,888	)	$	434


Actuarial assumptions:
Discount rate		4.40% to 4.62	%		3.55% to 3.80	%		4.44% to 4.59	%
Expected return on plan assets		7.25	%		7.50	%		7.75	%
Long-term rate of compensation increase		NA			NA			3.50% to 5.00	%