Loss Per Share (Tables)
 9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Computations of Class A Basic and Diluted Earnings (Loss) per Share
The computations for Class A basic and diluted loss per share are as follows (in thousands except share data):
 
Three months ended September 30,
 
Nine months ended September 30,
 
2016
 
2015
 
2016
 
2015
Numerator for basic and diluted loss per share:
 
 
 
 
 
 
 
Net loss attributable to Pattern Energy
$
(4,013
)
 
$
(29,405
)
 
$
(30,906
)
 
$
(34,987
)
Less: dividends declared on Class A common stock
(34,988
)
 
(27,113
)
 
(92,759
)
 
(75,117
)
Less: earnings allocated to participating securities
(16
)
 
—

 
(36
)
 
—

Undistributed loss attributable to common stockholders
$
(39,017
)
 
$
(56,518
)
 
$
(123,701
)
 
$
(110,104
)
 
 
 
 
 
 
 
 
Denominator for loss per share:
 
 
 
 
 
 
 
Weighted average number of shares:
 
 
 
 
 
 
 
Class A common stock - basic and diluted
81,531,775

 
72,789,583

 
76,821,811

 
69,233,698

 
 
 
 
 
 
 
 
Calculation of basic and diluted loss per share:
 
 
 
 
 
 
 
Dividends
$
0.43

 
$
0.37

 
$
1.21

 
$
1.08

Undistributed loss
(0.48
)
 
(0.78
)
 
(1.61
)
 
(1.59
)
Basic and diluted loss per share
$
(0.05
)
 
$
(0.40
)
 
$
(0.40
)
 
$
(0.51
)
 
 
 
 
 
 
 
 
Dividends declared per Class A common share
$
0.40

 
$
0.36

 
$
1.17

 
$
1.06