Goodwill (Details) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 47,624,000
Foreign Currency Translation	(1,351,000)
Impairments	(38,559,000)	$ 0	$ 0
Goodwill, Ending balance	7,714,000	47,624,000
Western Hemisphere
Goodwill [Roll Forward]
Goodwill, Beginning balance	39,158,000
Foreign Currency Translation	(599,000)
Impairments	(38,559,000)
Goodwill, Ending balance	0	39,158,000
Eastern Hemisphere
Goodwill [Roll Forward]
Goodwill, Beginning balance	8,466,000
Foreign Currency Translation	(752,000)
Impairments	0
Goodwill, Ending balance	$ 7,714,000	8,466,000
Percentage fair value in excess of carrying value	71.00%
Asia Pacific
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 0
Foreign Currency Translation	0
Impairments	0
Goodwill, Ending balance	$ 0	$ 0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Percentage of fair value of reporting unit in excess of carrying amount.

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