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Disposition of Assets (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Loss from discontinued operation, net of income taxes	$ (406)	$ (270)	$ (1,584)	$ (739)
From discontinued operation (in US dollars per share)	$ (0.01)	$ 0.00	$ (0.03)	$ (0.01)
Restructuring reserve	$ 474	$ 458	$ 474	$ 458	$ 81	$ 281
UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member]
Income Statement [Abstract]
Revenues	40	149	108	509
Loss from discontinued operation, net of income taxes	$ (406)	$ (270)	$ (1,584)	$ (739)
From discontinued operation (in US dollars per share)	$ (0.01)	$ 0.00	$ (0.03)	$ (0.01)
Assets of discontinued operation:
Current assets	$ 1,689		$ 1,689		2,525
Liabilities of discontinued operation:
Current liabilities	3,644		3,644		$ 4,407
SeveranceandFacilityClosing [Member] | UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member]
Income Statement [Abstract]
Restructuring reserve	$ 100		$ 100

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