Prepaids and Other Current Assets Related-party receivables (Details) - USD ($)
$ in Thousands

6 Months Ended

Jun. 30, 2018

Dec. 31, 2017

Prepaid Expense and Other Assets, Current [Abstract]

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

Prepaid expenses and other current assets consist of the following (in thousands): 

	June 30, 2018		December 31, 2017
Deposits	$	431	$	21,940
Other prepaid expenses and receivables	13,897		4,208
Prepaid insurance and property taxes	2,045		2,580
VAT/GST receivable	5,577		8,097
Deferred tax charge	1,912		1,326
Other	4,880		3,135
	$	28,742	$	41,286

Related Party Transaction [Line Items]

Due from Related Parties, Current

$ 78,358

$ 98,807

^[1]

Accounts Receivable [Member]

Related Party Transaction [Line Items]

Due from Related Parties, Current

66,651

36,425

Prepaid Expenses and Other Current Assets [Member]

Related Party Transaction [Line Items]

Due from Related Parties, Current

$ 11,707

$ 62,382

[1] December 31, 2017 balances were derived from audited consolidated financial statements.