LONG-TERM DEBT - Additional Information (Details)				1 Months Ended		3 Months Ended		12 Months Ended			17 Months Ended
	Mar. 12, 2015 USD ($)	May. 01, 2014 USD ($)	Feb. 08, 2013 USD ($)	Mar. 31, 2015 USD ($)	Feb. 28, 2014 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) payment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)	Dec. 22, 2013	Oct. 08, 2013 $ / shares	Sep. 07, 2013	Sep. 06, 2013
Debt Instrument [Line Items]
Aggregate principal amount outstanding								$ 1,837,200,000
Scheduled principal payments								30,000,000
Gain (loss) on early extinguishment of debt							$ (1,900,000)	0	$ (2,000,000)	$ (29,700,000)
Standby and trade letters of credit for various corporate purposes								$ 8,800,000	9,000,000		$ 9,000,000
Preferred stock, par value (in dollars per share) | $ / shares													$ 0.01
Amended Term Loan Facility [Member]
Debt Instrument [Line Items]
Repayment of debt	$ 24,600,000
Percentage Of Annual Excess Cash Flow For Pre Payment Of Loan				50.00%				50.00%
Line of Credit Facility, Commitment Fee Percentage								0.25%
Line of Credit Facility, Fronting Fee Percentage								0.25%
Line of Credit Facility, Administrative Fee Percentage								0.25%
Letter Of Credit Fronting Fee								0.25%
Line Of Credit Facility Additional Borrowing Capacity					$ 300,000,000
Required Prepayment, Number Of Days Following Last Day Of Fiscal Year								100 days
Required Prepayment of Debt								$ 23,200,000
Debt Instrument, Periodic Payment, Principal								6,900,000
Debt Instrument, Periodic Payment, Principal, After Giving Effect to Prepayment								$ 6,800,000
Leverage Ratio					3.50
Debt Instrument, Periodic Payment, Principal, Percentage								0.25%
2011 Term Loan [Member]
Debt Instrument [Line Items]
Repayment of debt						$ 12,100,000
Aggregate principal amount outstanding				$ 662,900,000		662,900,000		$ 662,900,000
Maximum borrowings available under credit facility					$ 675,000,000
Basis spread on variable interest rate					2.50%					3.00%
Debt Instrument, Variable Rate Floor					0.75%					1.00%
Debt Instrument Basis Spread On Alternative Base Rate					1.50%					2.00%
Floor on alternate base rate					1.75%
Repayments of Long-term Debt			$ 113,000,000					0	0	$ 113,000,000
2011 Term Loan [Member] | Swingline Loan [Member]
Debt Instrument [Line Items]
Maximum borrowings available under credit facility					$ 30,000,000.0
2011 Term Loan [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowings available under credit facility					60,000,000.0
2011 Term Loan [Member] | February 2014 Term Loan Amendment [Member]
Debt Instrument [Line Items]
Debt Issuance Cost									1,100,000
Write off of Deferred Debt Issuance Cost									800,000
Gain (loss) on early extinguishment of debt									(1,900,000)
Acquisition Term Loan [Member]
Debt Instrument [Line Items]
Repayment of debt						12,500,000
Aggregate principal amount outstanding								673,700,000
Scheduled principal payments				$ 1,800,000		$ 1,800,000		6,800,000	6,900,000		6,900,000
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months, Quarterly Amount									1,700,000		1,700,000
Maximum borrowings available under credit facility					$ 700,000,000
Leverage Ratio					4.25
Repayments of Long-term Debt								19,300,000	$ 7,000,000	0
Amended Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings available under credit facility					$ 175,000,000.0			175,000,000
Line Of Credit Facility Additional Borrowing Capacity					100,000,000.0
Difference Between Borrowing Base and Amounts Outstanding					$ 20,000,000.0
Consolidated Fixed Charge Coverage Ratio					100.00%
Cash Proceeds From Sales of Term Loan First Lien Collateral, Limit					$ 10,000,000
Cash Proceeds From Sales of Term Loan First Lien Collateral, Carryover					25,000,000
Cash Proceeds From Sales of Term Loan First Lien Collateral, Additional Carryover					$ 25,000,000
Reinvestment Right Period					365 days
Reinvestment Right Period, if Company Entered into a Legally Binding Commitment Before Expiration of Initial Reinvestment Right Period					545 days
Percentage Of Voting Capital Stock					66.00%
Percentage Of Non Voting Capital Stock					100.00%
Maximum Amount Of Restricted Payments To Affiliates					$ 10,000,000
Aggregate Amount Of Other Restricted Payments					35,000,000
Maximum Consideration For Affiliate Transactions					10,000,000
Maximum Aggregate Payments Related To Affiliates											$ 20,000,000
Aggregate Principal Amount Default					$ 50,000,000.0
Capital Stock Ownership					100.00%
Percentage voting power ownership by affiliate					35.00%
Standby and trade letters of credit for various corporate purposes								8,800,000
Remaining borrowing capacity								166,200,000
Amended And Restated Senior Subordinated Term Loan Due Two Thousand And Fourteen [Member]
Debt Instrument [Line Items]
Write off of Deferred Debt Issuance Cost		$ 100,000
Repayments of Subordinated Debt		$ 58,400,000
5 3/4% Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Aggregate principal amount outstanding								$ 500,000,000		500,000,000
Stated interest rate (percent)			5.75%					5.75%	5.75%		5.75%
Debt Instrument, Face Amount			$ 500,000,000
Proceeds from Issuance of Senior Long-term Debt			491,200,000
Financing Costs			$ 19,400,000
Redemption percentage									101.00%
Days to file registration statement			150 days
Days for registration to become effective			210 days
Days to affect an exchange offer			270 days
Days following failure			90 days
Additional Interest			0.25%
Additional interest after 90 days			0.25%
Subsequent failure period			90 days
Maximum additional interest			0.50%
Debt Instrument, Interest Rate, Effective Percentage												6.25%		6.00%	5.75%
Additional interest under Registration Rights Agreement										400,000
9.75% Senior Secured Notes Due 2015 [Member]
Debt Instrument [Line Items]
Stated interest rate (percent)								9.75%
Repayments of Long-term Debt			$ 330,000,000					$ 0	$ 0	$ 330,000,000
Debt Instrument Accrued Interest			$ 8,600,000
Spanish Government Loan Due 2025 [Member]
Debt Instrument [Line Items]
Term loan facility								$ 600,000	$ 700,000		$ 700,000
Number of Equal Installment Payments | payment								10