COMMITMENTS AND CONTINGENCIES Operating Lease Payments (Details) $ in Thousands, CZK in Millions		Dec. 31, 2016 CZK	Dec. 31, 2016 USD ($)	Dec. 31, 2015 CZK	Dec. 31, 2015 USD ($)
Long-term Purchase Commitment [Line Items]
Long-term Line of Credit	[1],[2],[3]		$ 0		$ 0
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2015			3,374
2016			2,077
2017			923
2018			476
2019			327
2020 and thereafter			1,433
Total			8,610
Purchase Commitment [Member]
Long-term Purchase Commitment [Line Items]
2015			43,462
2016			34,889
2017			32,074
2018			14,003
2019			1,503
2020 and thereafter			2,281
Total			128,212		144,900
Transmission Service Agreement [Member]
Long-term Purchase Commitment [Line Items]
2015			17,545
2016			5,157
2017			10,851
2018			356
2019			322
2020 and thereafter			44
Total			34,275
Machinery and Equipment [Member]
Long-term Purchase Commitment [Line Items]
2015			609
2016			0
2017			0
2018			0
2019			0
2020 and thereafter			0
Total			609
Factoring Agreement [Member] | CZECH REPUBLIC
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Receivables Pledged As Collateral Related To Factoring Agreement		CZK 462.9	$ 18,100	CZK 478.9	$ 18,700

[1] As at December 31, 2016 and December 31, 2015, there were no drawings outstanding under a CZK 735.0 million (approximately US$ 28.7 million) factoring framework agreement with Factoring Ceska Sporitelna (“FCS”). Under this facility, up to CZK 735.0 million (approximately US$ 28.7 million) of receivables from certain customers in the Czech Republic may be factored on a recourse or non-recourse basis. The facility has a factoring fee of 0.3% of any factored receivable and bears interest at one-month PRIBOR plus 2.5% per annum for the period that receivables are factored and outstanding.

[2] As at December 31, 2016 there were RON 105.7 million (approximately US$ 24.6 million) of receivables factored under a factoring framework agreement with Global Funds IFN S.A. entered into in the first quarter of 2016. Under this facility, receivables from certain customers in Romania may be factored on a non-recourse basis. The facility has a factoring fee of 4.0% of any factored receivable and bears interest at 6.0% per annum from the date the receivables are factored to the due date of the factored receivable.

[3] We have a cash pooling arrangement with Bank Mendes Gans (“BMG”), a subsidiary of ING Bank N.V. (“ING”), which enables us to receive credit across the group in respect of cash balances which our subsidiaries deposit with BMG. Cash deposited by our subsidiaries with BMG is pledged as security against the drawings of other subsidiaries up to the amount deposited.As at December 31, 2016, we had deposits of US$ 16.4 million in and no drawings on the BMG cash pool. Interest is earned on deposits at the relevant money market rate. As at December 31, 2015, we had deposits of US$ 19.6 million in and no drawings on the BMG cash pool.