Acquisitions Schedule of Amounts Included in Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Business Acquisition [Line Items]        
Total revenue $ 91,914 $ 89,697 $ 272,991 $ 239,234
Total expenses 14,744 9,105 38,503 27,625
Net loss (11,050) (35,332) (55,744) (51,734)
Less: net loss attributable to noncontrolling interest (7,037) (5,927) (24,838) (16,747)
Net loss attributable to Pattern Energy $ (4,013) (29,405) $ (30,906) (34,987)
Lost Creek And Post Rock        
Business Acquisition [Line Items]        
Total revenue   10,081   15,253
Total expenses   15,197   21,547
Net loss   (5,116)   (6,294)
Less: net loss attributable to noncontrolling interest   (1,965)   (2,765)
Net loss attributable to Pattern Energy   $ (3,151)   $ (3,529)