LONG-TERM DEBT - Components of Long-term Debt (Details) - USD ($)	Feb. 29, 2016	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term Debt		$ 1,790,400,000	$ 1,813,700,000
Less current portion		(6,800,000)	(30,000,000)	[1]
Long-term debt		1,783,600,000	1,783,700,000	[1]
Acquisition Term Loan due 2019 [Member]
Debt Instrument [Line Items]
Debt		648,500,000	662,100,000
Repayment of debt	$ 11,700,000
Quarterly principal amortization payments			1,700,000
Maximum borrowings available under credit facility		700,000,000.0
Aggregate principal amount outstanding		658,600,000
2011 Term Loan due 2017 [Member]
Debt Instrument [Line Items]
Debt		648,200,000	658,500,000
Repayment of debt	11,500,000
Maximum borrowings available under credit facility		675,000,000.0
Aggregate principal amount outstanding	651,400,000	651,400,000
Amended Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit		0	$ 0
Maximum borrowings available under credit facility		$ 175,000,000
5 3/4% Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Stated interest rate		5.75%	5.75%
Senior notes		$ 493,100,000	$ 492,500,000
Maximum borrowings available under credit facility		500,000,000
Spanish Government Loan due 2025 [Member]
Debt Instrument [Line Items]
Debt		$ 600,000	$ 600,000
Amended Term Loan Facility [Member]
Debt Instrument [Line Items]
Repayment of debt	$ 23,200,000

[1] Adjusted as a result of the adoption of certain accounting pronouncements beginning on January 1, 2016. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements" for details of these adjustments.