EMPLOYEE BENEFIT PLANS Table 1 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plans (The Pension Plan, Excess Pension Plan and SERP) [Member]
Change in benefit obligation:
Benefit obligation, January 1	$ 114,046	$ 78,017
Service cost	16,321	15,614	12,484
Interest cost	5,036	4,012	2,881
Transfer to joint venture	0	0
Disposition charges (a)	180	4,397
Plan amendments	(24,560)	(295)
Benefits paid	(7,353)	(1,647)
Participants contributions	0	0
Actuarial (gain) loss	(15,708)	18,359
Curtailment (a)	(330)	(4,411)
Benefit obligation, December 31	87,632	114,046	78,017
Change in plan assets:
Plan assets at fair value, January 1	69,269	53,787
Actual return on plan assets	11,905	6,063
Company contributions	1,752	11,066
Benefits paid	(7,353)	(1,647)
Participants contributions	0	0
Plan assets at fair value, December 31	75,573	69,269	53,787
Reconciliation of funded status:
Fair value of plan assets at December 31	75,573	69,269	53,787
Less: Benefit obligation at December 31	87,632	114,046	78,017
Funded status at December 31	(12,059)	(44,777)
Amounts recognized in the consolidated balance sheets:
Accrued compensation expense	(2,333)	(137)
Long-term liabilities	(9,726)	(44,640)
Net pension liability	(12,059)	(44,777)
Other Postretirement Benefit Plans [Member]
Change in benefit obligation:
Benefit obligation, January 1	20,962	18,672
Service cost	1,171	1,258	1,040
Interest cost	940	976	888
Transfer to joint venture	(1,284)	(90)
Disposition charges (a)	0	1,284
Plan amendments	(11,822)	(2,420)
Benefits paid	(248)	(149)
Participants contributions	125	62
Actuarial (gain) loss	(2,690)	2,622
Curtailment (a)	0	(1,253)
Benefit obligation, December 31	7,154	20,962	18,672
Change in plan assets:
Plan assets at fair value, January 1	0	0
Actual return on plan assets	0	0
Company contributions	123	87
Benefits paid	(248)	(149)
Participants contributions	125	62
Plan assets at fair value, December 31	0	0	0
Reconciliation of funded status:
Fair value of plan assets at December 31	0	0	0
Less: Benefit obligation at December 31	7,154	20,962	18,672
Funded status at December 31	(7,154)	(20,962)
Amounts recognized in the consolidated balance sheets:
Accrued compensation expense	(141)	(243)
Long-term liabilities	(7,013)	(20,719)
Net pension liability	$ (7,154)	$ (20,962)