LONG-TERM DEBT, DERIVATIVES AND LETTERS OF CREDIT - Additional Information (Detail) € in Millions		3 Months Ended	12 Months Ended
	Jul. 31, 2017 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2018 EUR (€)	Feb. 29, 2016 USD ($)	Dec. 31, 2015 USD ($)
Line of Credit Facility [Line Items]
Borrowing capacity							$ 600,000,000
Commitment fees on unused borrowing capacity			0.50%
Percentage of equity interests of material first-tier foreign subsidiaries guaranteed to the line of credit facility			65.00%			65.00%
Senior Secured Leverage Ratio			2.56			2.56
Interest Coverage Ratio			2.90			2.90
Cash on hand			$ 18,288,000	$ 26,552,000	$ 46,216,000			$ 49,825,000
Available borrowing capacity			66,000,000
Write-off of deferred loan costs			$ 0	1,244,000	$ 0
LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate			3.00%
Net investment hedge
Line of Credit Facility [Line Items]
Borrowing under credit facility			$ 14,100,000			€ 12.3
Credit Facility
Line of Credit Facility [Line Items]
Write-off of deferred loan costs		$ 1,200,000
Unamortized debt issuance costs			$ 1,800,000
Convertible debt
Line of Credit Facility [Line Items]
Debt Instrument, Term			72 months
Issuance of convertible debt, face amount	$ 230,000,000
Interest rate on convertible debt	5.00%		5.00%			5.00%
Unamortized debt issuance costs			$ 5,834,000	6,820,000
March 31, 2019 and thereafter
Line of Credit Facility [Line Items]
Minimum interest coverage ratio			2.50			2.50
September 30, 2019 and thereafter
Line of Credit Facility [Line Items]
Maximum ratio of senior secured debt to consolidated EBITDA			2.75			2.75
June 30, 2019
Line of Credit Facility [Line Items]
Maximum ratio of senior secured debt to consolidated EBITDA			3.50			3.50
March 31, 2019
Line of Credit Facility [Line Items]
Maximum ratio of senior secured debt to consolidated EBITDA			3.50			3.50
December 31, 2018
Line of Credit Facility [Line Items]
Maximum ratio of senior secured debt to consolidated EBITDA			3.50			3.50
Minimum interest coverage ratio			2.25			2.25
Standby Letters of Credit
Line of Credit Facility [Line Items]
Outstanding letter of credit			$ 22,800,000	$ 22,500,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Borrowing capacity			$ 300,000,000				400,000,000
Debt Instrument, Term			5 years
Term Loan Facility
Line of Credit Facility [Line Items]
Borrowing capacity							$ 200,000,000
Debt Instrument, Term			5 years
Repayment of term loan	$ 160,000,000
Swing Line Facility
Line of Credit Facility [Line Items]
Borrowing capacity			$ 35,000,000