EMPLOYEE BENEFIT PLANS Table 1 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Change in benefit obligation:
Disposition charges (a)	$ 5,700
Pension Plans (The Pension Plan, Excess Pension Plan and SERP) [Member]
Change in benefit obligation:
Benefit obligation, January 1	78,017	50,292
Service cost	15,614	12,484	11,384
Interest cost	4,012	2,881	2,233
Transfer to joint venture	0	0
Disposition charges (a)	4,397	0	0
Plan amendments	(295)	0
Benefits paid	(1,647)	(1,217)
Participants contributions	0	0
Actuarial loss	18,359	13,577
Curtailment (a)	(4,411)	0
Benefit obligation, December 31	114,046	78,017	50,292
Change in plan assets:
Plan assets at fair value, January 1	53,787	46,877
Actual return on plan assets	6,063	934
Company contributions	11,066	7,193
Benefits paid	(1,647)	(1,217)
Participants contributions	0	0
Plan assets at fair value, December 31	69,269	53,787	46,877
Reconciliation of funded status:
Fair value of plan assets at December 31	69,269	53,787	46,877
Less: Benefit obligation at December 31	114,046	78,017	50,292
Funded status at December 31	(44,777)	(24,230)
Amounts recognized in the consolidated balance sheets:
Accrued compensation expense	(137)	(99)
Long-term liabilities	(44,640)	(24,131)
Net pension liability	(44,777)	(24,230)
Other Postretirement Benefit Plans [Member]
Change in benefit obligation:
Benefit obligation, January 1	18,672	15,368
Service cost	1,258	1,040	904
Interest cost	976	888	832
Transfer to joint venture	(90)	0
Disposition charges (a)	1,284	0	0
Plan amendments	(2,420)	0
Benefits paid	(149)	(126)
Participants contributions	62	69
Actuarial loss	2,622	1,433
Curtailment (a)	(1,253)	0
Benefit obligation, December 31	20,962	18,672	15,368
Change in plan assets:
Plan assets at fair value, January 1	0	0
Actual return on plan assets	0	0
Company contributions	87	57
Benefits paid	(149)	(126)
Participants contributions	62	69
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	20,962	18,672	15,368
Funded status at December 31	(20,962)	(18,672)
Amounts recognized in the consolidated balance sheets:
Accrued compensation expense	(243)	(162)
Long-term liabilities	(20,719)	(18,510)
Net pension liability	$ (20,962)	$ (18,672)