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Disposition of Assets (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Loss from discontinued operation, net of income taxes	$ (1,097)	$ (114)	$ (1,178)	$ (469)
From discontinued operation (in US dollars per share)	$ (0.02)	$ 0.00	$ (0.02)	$ (0.01)
Restructuring reserve	$ 327	$ 541	$ 327	$ 541	$ 81	$ 281
UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member]
Income Statement [Abstract]
Revenues	5	84	68	360
Loss from discontinued operation, net of income taxes	$ (1,097)	$ (114)	$ (1,178)	$ (469)
From discontinued operation (in US dollars per share)	$ (0.02)	$ 0.00	$ (0.02)	$ (0.01)
Assets of discontinued operation:
Current assets	$ 2,033		$ 2,033		2,525
Liabilities of discontinued operation:
Current liabilities	3,690		3,690		$ 4,407
SeveranceandFacilityClosing [Member] | UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member]
Income Statement [Abstract]
Restructuring reserve	$ 200		$ 200

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