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.

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=120391452&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=120398452&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=120400017&loc=d3e572229-122910

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Other credit facilities and capital lease obligations composition (Details) $ in Thousands, Kč in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020 CZK (Kč)	Jun. 30, 2020 CZK (Kč)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Capital Leased Assets [Line Items]
Other credit facilities and finance leases			$ 14,623	$ 16,332
Debt Instrument, Basis Spread on Variable Rate	0.30%
BMG Bank Mendes Gans [Member]
Capital Leased Assets [Line Items]
Credit facilities			0
Line Of Credit Facility Cash Pooling Arrangement Deposit			80,100	$ 11,600
Ceska Sporitelna [Member]
Capital Leased Assets [Line Items]
Receivables Subject to a Factoring Agreement, Recourse or Non-Recourse Basis	Kč 475.0	Kč 475.0	$ 19,900
Factoring Fee, Percentage		0.19%
Debt Instrument, Basis Spread on Variable Rate	0.95%
KB [Member]
Capital Leased Assets [Line Items]
Factoring Fee, Percentage		0.11%
Debt Instrument, Basis Spread on Variable Rate	0.95%