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Disposition of Assets (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Loss from discontinued operation, net of income taxes	$ (81)	$ (355)
From discontinued operation (in US dollars per share)	$ 0.00	$ 0.00
Restructuring reserve	$ 172	$ 239	$ 81	$ 281
UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member]
Income Statement [Abstract]
Revenues	63	276
Loss from discontinued operation, net of income taxes	$ (81)	$ (355)
From discontinued operation (in US dollars per share)	$ 0.00	$ 0.00
Assets of discontinued operation:
Current assets	$ 2,324		2,525
Liabilities of discontinued operation:
Current liabilities	3,548		$ 4,407
SeveranceandFacilityClosing [Member] | UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member]
Income Statement [Abstract]
Restructuring reserve	$ 400

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