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Restatement of Previously Reported Consolidated Financial Statements - Narratives (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)	$ (7,839)	$ (14,998)	$ 39,970	$ 42,036	$ 18,713	$ 32,763	$ 24,972	$ 51,476	$ 17,133	$ 93,512	$ (125,697)	$ 88,661	$ 126,606
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)	$ (3,606)	$ (22,787)	$ (1,115)	$ (122)	$ (2,150)	$ (2,131)	$ (23,902)	$ (4,281)	$ (27,508)	$ (4,403)	(26,731)	(37,221)	(29,136)
Restatement Adjustment | Belleli EPC
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)											$ (26,900)	$ (37,800)	$ (30,600)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
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