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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 |  |  |  |  |

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- Definition Percentage of equity interests of material first-tier foreign subsidiaries guaranteed to the line of credit facility + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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