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EMPLOYEE BENEFIT PLANS (Tables)

12 Months Ended

Dec. 31, 2012

Defined Benefit Pension Plan

Schedule of benefit obligation, fair value of plan assets and the funded status of the Company's defined benefit pension plan and unfunded excess benefit plan

	Defined Benefit Pension Plan						Unfunded Excess Benefits Plan

	2012			2011			2012			2011
	(Dollars In Thousands)
Accumulated benefit obligation, end of year	$	210,319		$	186,300		$	39,828		$	33,675

Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$	199,162		$	165,704		$	36,256		$	31,592
Service cost		9,145			8,682			867			679
Interest cost		8,977			8,938			1,473			1,506
Amendments		—			94			—			3
Actuarial (gain) or loss		15,286			23,859			6,946			4,187
Benefits paid		(9,251	)		(8,115	)		(2,571	)		(1,711	)

Projected benefit obligation at end of year		223,319			199,162			42,971			36,256

Change in plan assets:
Fair value of plan assets at beginning of year		125,058			117,856			—			—
Actual return on plan assets		15,202			2,874			—			—
Employer contributions⁽¹⁾		21,178			12,443			2,571			1,711
Benefits paid		(9,251	)		(8,115	)		(2,571	)		(1,711	)

Fair value of plan assets at end of year		152,187			125,058			—			—

After reflecting FASB guidance:
Funded status		(71,132	)		(74,104	)		(42,971	)		(36,256	)

Amounts recognized in the balance sheet:
Other liabilities		(71,132	)		(74,104	)		(42,971	)		(36,256	)

Amounts recognized in accumulated other comprehensive income:
Net actuarial loss		95,055			91,804			17,571			11,924
Prior service cost/(credit)		(1,816	)		(2,208	)		48			60

Total	$	93,239		$	89,596		$	17,619		$	11,984

⁽¹⁾: Employer contributions disclosed are based on the Company's fiscal filing year

Schedule of weighted-average assumptions used to determine benefit obligations

	Defined Benefit Pension Plan						Unfunded Excess Benefits Plan

	2012			2011			2012			2011
Discount rate		4.07	%		4.62	%		3.37	%		4.07	%
Rate of compensation increase		3.0			2.5 - 3.0			4.0			3.5 - 4.0
Expected long-term return on plan assets		7.5			7.75			N/A			N/A

Schedule of weighted-average assumptions used to determine the net periodic benefit cost

	Defined Benefit Pension Plan									Unfunded Excess Benefits Plan

	2012			2011			2010			2012			2011			2010
Discount rate		4.62	%		5.30	%		5.57	%		4.07	%		4.79	%		5.40	%
Rates of compensation increase		2.5 - 3.0			2.5 - 3.0			0 - 3.75			3.5 - 4.0			3.5 - 4.0			0 - 4.75
Expected long-term return on plan assets		7.75			7.75			8.00			N/A			N/A			N/A

Components of the net periodic benefit cost

	Defined Benefit Pension Plan									Unfunded Excess Benefits Plan

	2012			2011			2010			2012		2011		2010
	(Dollars In Thousands)
Service cost—benefits earned during the period	$	9,145		$	8,682		$	7,423		$	867	$	679	$	584
Interest cost on projected benefit obligation		8,977			8,938			8,091			1,473		1,506		1,545
Expected return on plan assets		(10,916	)		(10,021	)		(9,349	)		—		—		—
Amortization of prior service cost/(credit)		(392	)		(392	)		(403	)		12		12		12
Amortization of actuarial losses⁽¹⁾		7,749			5,625			3,905			1,300		881		653

Total benefit cost	$	14,563		$	12,832		$	9,667		$	3,652	$	3,078	$	2,794

⁽¹⁾: 2012 average remaining service period used is 8.14 years and 7.51 years for the defined benefit pension plan and unfunded excess benefit plan, respectively.

Schedule of estimated net actuarial loss, prior service cost and transition obligation that will be amortized from accumulated other comprehensive income into net periodic benefit cost during the next fiscal year

The estimated net actuarial loss, prior service cost/(credit), and transition obligation for these plans that will be amortized from accumulated other comprehensive income into net periodic benefit cost during 2013 is as follows:

	Defined Benefit Pension Plan			Unfunded Excess Benefits Plan

	(Dollars In Thousands)
Net actuarial loss	$	9,150		$	1,767
Prior service cost/(credit)		(392	)		12
Transition obligation		—			—

Schedule of allocation of plan assets by category

Asset Category

Cash and cash equivalents	2.0	%	4.0	%	1.0	%
Equity securities	60.0		60.0		61.0
Fixed income	38.0		36.0		38.0

Total	100.0	%	100.0	%	100.0	%

Schedule of fair value of plan assets by category

	As of December 31,

Asset Category	2012		2011
	(Dollars In Thousands)
Cash	$	6,222	$	1,004
Equity securities:
Collective Russell 3000 Equity Index Fund		61,451		52,792
Fidelity Spartan U.S. Equity Index Fund		34,482		29,735
Fixed income		50,032		41,527

Total investments		152,187		125,058
Employer contribution receivable		—		2,270

Total	$	152,187	$	127,328

Schedule of fair value of plan assets, set forth by level, within the fair value hierarchy

The following table sets forth by level, within the fair value hierarchy, the Plan's assets at fair value as of December 31, 2012:

	Level 1		Level 2		Level 3		Total

	(Dollars In Thousands)
Collective short-term investment fund	$	—	$	6,222	$	—	$	6,222
Collective investment funds		—		95,933		—		95,933
Group deposit administration annuity contract		—		—		50,032		50,032

Total investments	$	—	$	102,155	$	50,032	$	152,187

The following table sets forth by level, within the fair value hierarchy, the Plan's assets at fair value as of December 31, 2011:

	Level 1		Level 2		Level 3		Total

	(Dollars In Thousands)
Collective short-term investment fund	$	—	$	1,004	$	—	$	1,004
Collective investment funds		—		82,527		—		82,527
Group deposit administration annuity contract		—		—		41,527		41,527

Total investments	$	—	$	83,531	$	41,527	$	125,058

Reconciliation of the beginning and ending balances for fair value measurements for which significant unobservable inputs (level 3) have been used

	As of December 31,

	2012		2011
	(Dollars In Thousands)
Balance, beginning of year	$	41,527	$	39,403
Interest income		2,505		2,124
Transfers from collective short-term investments fund		6,000		—
Transfers to collective short-term investments fund		—		—

Balance, end of year	$	50,032	$	41,527

Schedule of estimated future benefit payments under defined benefit pension plan

Years	Defined Benefit Pension Plan		Unfunded Excess Benefits Plan

	(Dollars In Thousands)
2013	$	13,088	$	3,614
2014		12,516		3,742
2015		12,949		3,843
2016		13,603		3,838
2017		15,250		4,001
2018 - 2022		81,524		17,486

Retiree medical plan

EMPLOYEE BENEFIT PLANS

Schedule of accumulated postretirement benefit obligation

	As of December 31,

	2012			2011
	(Dollars In Thousands)
Change in Benefit Obligation
Benefit obligation, beginning of year	$	949		$	1,309
Service cost		6			9
Interest cost		17			28
Amendments		—			(29	)
Actuarial (gain) or loss		(144	)		(297	)
Plan participant contributions		293			255
Benefits paid		(333	)		(326	)
Special termination benefits		—			—

Benefit obligation, end of year	$	788		$	949

Group life insurance plan