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Acquisition - Schedule of Amounts Included in Consolidated Statements of Operations (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
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Sep. 30, 2014
|
Dec. 31, 2013
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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| Business Acquisition [Line Items] | |||||
| Total revenue | $ 71,519 | $ 57,257 | $ 186,075 | $ 159,806 | |
| Total expenses | 7,264 | 3,821 | 20,118 | 9,531 | |
| Net loss | (9,281) | (19,533) | 4,243 | (24,013) | 29,447 |
| Less: net loss attributable to noncontrolling interest | (2,073) | 3,248 | (13,115) | (690) | |
| Net loss attributable to controlling interest | (7,208) | 995 | (10,898) | 30,137 | |
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Panhandle 1 and E1 Arrayan [Member]
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| Business Acquisition [Line Items] | |||||
| Total revenue | 13,516 | 13,355 | |||
| Total expenses | 17,196 | 17,416 | |||
| Net loss | (3,680) | (4,061) | |||
| Less: net loss attributable to noncontrolling interest | (2,666) | (2,785) | |||
| Net loss attributable to controlling interest | $ (1,014) | $ (1,276) | |||