COMMITMENTS AND CONTINGENCIES Other (Details)	3 Months Ended
Mar. 31, 2017 USD ($)
Percentage owned by Parent	100.00%
BULGARIA [Member]
Percentage owned by Parent	94.00%
SLOVAK REPUBLIC [Member]
Percentage owned by Parent	100.00%
Loss Contingency, Pending Claims, Number	4
Loss Contingency, Range of Possible Loss, Maximum	$ 69,000,000
Loss Contingency, Claims Dismissed, Number	1
Loss Contingency, Claims Dismissed, Value	$ 26,000,000
CROATIA
Percentage owned by Parent	100.00%
Loss Contingency, Range of Possible Loss, Maximum	$ 4,300,000
Other commitments [Member]
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months	15,976,000
Unrecorded Unconditional Purchase Obligation, Due within Two Years	5,372,000
Unrecorded Unconditional Purchase Obligation, Due within Three Years	10,869,000
Unrecorded Unconditional Purchase Obligation, Due within Four Years	375,000
Unrecorded Unconditional Purchase Obligation, Due within Five Years	335,000
2020 and thereafter	382,000
Unrecorded Unconditional Purchase Obligation	$ 33,309,000

Loss Contingency, Claims Dismissed, Value

No definition available.

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- Definition

Number of claims dismissed.

+ References

No definition available.

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

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- Definition

The estimated maximum amount of possible loss from the contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

+ Details

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

+ References

+ Details

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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