CONTINGENCIES AND COMMITMENTS (Detail) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2013	Oct. 10, 2013	Mar. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Surety Bond Outstanding			$ 52,900,000
Damages sought	1,000,000,000
Range of possible loss, minimum			0
Range of possible loss, maximum			41,000,000
Failure to Meet Contractual Obligations [Member]
Loss Contingencies [Line Items]
Damages sought		25,000,000
Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit, outstanding			58,000,000	54,300,000
FinancialStandbyLetterOfCreditMember
Loss Contingencies [Line Items]
Letters of credit, outstanding			13,400,000	20,700,000
Discontinued Operations, Held-for-sale [Member] | Standby Letters Of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit, outstanding			$ 14,600,000