LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Credit Facility (Details) CZK in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2016 CZK Rate	Dec. 31, 2016 CZK	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Line of Credit Facility [Line Items]
Credit facilities	[1],[2],[3]			$ 0	$ 0
Capital leases				4,313,000	3,648,000
Total credit facilites and capital leases				4,313,000	3,648,000
Less current maturities				(1,494,000)	(1,155,000)
Total non current credit facilites an capital leasesd Capital Leases				2,819,000	2,493,000
Long-term Debt				$ 1,003,522,000	909,676,000
CME NV and CME BV [Member]
Line of Credit Facility [Line Items]
Outstanding Shares Pledged, Percentage		100.00%	100.00%	100.00%
BMG Bank Mendes Gans [Member]
Line of Credit Facility [Line Items]
Credit facilities				$ 0	0
Line of credit facility cash pooling arrangment deposit				16,400,000	$ 19,600,000
Ceska Sporitelna [Member] | CET 21 [Member]
Line of Credit Facility [Line Items]
Credit facilities				0
Debt Instrument, Basis Spread on Variable Rate			2.50%
Line of Credit Facility, Maximum Borrowing Capacity		CZK 735.0	CZK 735.0	$ 28,700,000
Factoring Fee, Percentage			0.30%
2021 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Stated interest rate	[4]	9.00%	9.00%	9.00%
Line of Credit Facility, Maximum Borrowing Capacity				$ 115,000,000
Debt Instrument, Face Amount				$ 0
2021 Revolving Credit Facility [Member] | CME NV and CME BV [Member]
Line of Credit Facility [Line Items]
Outstanding Shares Pledged, Percentage		100.00%	100.00%	100.00%
Alternative Base Rate [Member] | 2021 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate			8.00%
Base Rate [Member] | 2021 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate			9.00%
Stated interest rate		1.00%	1.00%	1.00%
Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.10%
Minimum [Member] | 2021 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate | Rate		6.00%
Debt Instrument, Reference Rate for Variable Rate | Rate		1.00%
Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.90%
Maximum [Member] | 2021 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate | Rate		9.00%

[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.

[4] (2) As at December 31, 2016, the aggregate principal amount available under the 2021 Revolving Credit Facility was undrawn.