Discontinued Operations (Narrative) (Details) - USD ($)	3 Months Ended									6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2012
Discontinued Operations [Line Items]
Discontinued operations, contingent assets	$ 0					$ 12,500,000						$ 0	$ 12,500,000	$ 26,200,000
Discontinued operations, net (loss) income	(5,900,000)	[1]	$ (320,000)	$ (149,000)	$ (122,000)	(1,300,000)	$ (3,700,000)	$ (500,000)	$ (900,000)	$ (272,000)	$ (592,000)	$ (6,452,000)	(6,456,000)	(9,223,000)
Globetec [Member]
Discontinued Operations [Line Items]
Discontinued operations, description												In 2012, the Company’s Board of Directors approved a plan of sale for its Globetec business. In 2013, the Company sold its interests in Globetec for nominal consideration and retained certain contingent assets and liabilities.
Discontinued operations, loss on disposal, before tax												$ 9,600,000
Discontinued operations, contingent assets	0											0
Discontinued operations, revenue													18,000,000	18,800,000
Discontinued operations, net (loss) income												(6,500,000)	(6,500,000)	(12,900,000)
Discontinued operations, losses on disposal and impairment charges, net of tax												5,800,000	4,400,000	8,300,000
Globetec [Member] | Prepaid Expenses and Other Current Assets [Member]
Discontinued Operations [Line Items]
Discontinued operations, contingent assets, prepaid expenses and other current assets						2,300,000							2,300,000
Globetec [Member] | Other Long-Term Assets [Member]
Discontinued Operations [Line Items]
Discontinued operations, contingent assets, long-term						10,100,000							10,100,000
Globetec [Member] | Other Current Liabilities [Member]
Discontinued Operations [Line Items]
Discontinued operations, contingent liabilities, current	$ 1,300,000					$ 1,200,000						$ 1,300,000	$ 1,200,000
DirectStar [Member]
Discontinued Operations [Line Items]
Discontinued operations, description												In June 2012, the Company sold its equity interests in DirectStar for a net sale price of $98.9 million in cash.
Discontinued operations, revenue														60,200,000
Discontinued operations, net (loss) income														$ 3,700,000
Discontinued operations, net sale price															$ 98,900,000

[1] Preliminary, unaudited fourth quarter and full year 2014 results were previously issued pursuant to a press release dated February 26, 2015 and not previously filed in a report under the Securities Exchange Act of 1934, as amended. The unaudited quarterly information for the three month period ended December 31, 2014 in the table above includes the effect of adjustments determined by management following the review process described in Note 2 - Independent Investigation of the Audit Committee and Related Restatements.