CONTINGENCIES AND COMMITMENTS (Detail) - USD ($)	Oct. 10, 2013	Jun. 30, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Range of possible loss, minimum		$ 0
Range of possible loss, maximum		48,000,000
Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit, outstanding		51,700,000	$ 54,300,000
FinancialStandbyLetterOfCreditMember
Loss Contingencies [Line Items]
Letters of credit, outstanding		15,600,000	$ 20,700,000
Failure to Meet Contractual Obligations [Member]
Loss Contingencies [Line Items]
Damages sought	$ 25,000,000
Discontinued Operations, Held-for-sale [Member] | Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit, outstanding		7,100,000
Surety Bond [Member]
Loss Contingencies [Line Items]
Surety Bond Outstanding		52,900,000
Damage from Fire, Explosion or Other Hazard [Member]
Loss Contingencies [Line Items]
Estimated Litigation Liability		$ 1,000,000,000