Consolidated Statement of Stockholders' Equity (Unaudited) (USD $)
In Thousands, except Share data
Total
USD ($)
Class A Common Stock [Member]
USD ($)
Class B Convertible Common Stock [Member]
USD ($)
IPO [Member]
Class A Common Stock [Member]
USD ($)
E1 Arrayan [Member]
USD ($)
Controlling Interest [Member]
USD ($)
Controlling Interest [Member]
Class A Common Stock [Member]
USD ($)
Controlling Interest [Member]
Class B Convertible Common Stock [Member]
USD ($)
Controlling Interest [Member]
IPO [Member]
Class A Common Stock [Member]
USD ($)
Controlling Interest [Member]
Class A Common Stock [Member]
USD ($)
Controlling Interest [Member]
Class A Common Stock [Member]
USD ($)
Controlling Interest [Member]
Class A Common Stock [Member]
Contribution Transactions [Member]
USD ($)
Controlling Interest [Member]
Class A Common Stock [Member]
IPO [Member]
Controlling Interest [Member]
Class B Common Stock [Member]
USD ($)
Controlling Interest [Member]
Class B Common Stock [Member]
Contribution Transactions [Member]
USD ($)
Controlling Interest [Member]
Additional Paid-in Capital [Member]
USD ($)
Controlling Interest [Member]
Additional Paid-in Capital [Member]
Class A Common Stock [Member]
USD ($)
Controlling Interest [Member]
Additional Paid-in Capital [Member]
Class B Convertible Common Stock [Member]
USD ($)
Controlling Interest [Member]
Additional Paid-in Capital [Member]
Contribution Transactions [Member]
USD ($)
Controlling Interest [Member]
Additional Paid-in Capital [Member]
IPO [Member]
Class A Common Stock [Member]
USD ($)
Controlling Interest [Member]
Capital [Member]
USD ($)
Controlling Interest [Member]
Capital [Member]
Contribution Transactions [Member]
USD ($)
Controlling Interest [Member]
Accumulated Income (Deficit) [Member]
USD ($)
Controlling Interest [Member]
Accumulated Income (Deficit) [Member]
Contribution Transactions [Member]
USD ($)
Controlling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
USD ($)
Noncontrolling Interest [Member]
USD ($)
Noncontrolling Interest [Member]
E1 Arrayan [Member]
USD ($)
Noncontrolling Interest [Member]
Capital [Member]
USD ($)
Noncontrolling Interest [Member]
Capital [Member]
E1 Arrayan [Member]
USD ($)
Noncontrolling Interest [Member]
Accumulated Income (Deficit) [Member]
USD ($)
Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
USD ($)
Balance at Dec. 31, 2012 $ 589,412         $ 514,111                   $ 1         $ 545,471   $ 2,903   $ (34,264) $ 75,301   $ 74,177   $ 12,366 $ (11,242)
Balance, shares at Dec. 31, 2012                   100                                          
Contribution 32,677         32,677                             32,677                    
Deemed distribution for Contribution Transactions (106,060)         (104,634)                             (104,634)         (1,426)   (1,426)      
Additional paid-in capital 2         2                   2                              
Distribution to noncontrolling interest (1,426)                                                            
Net income (loss) 29,447         30,295                                 30,295     (690)       (690)  
Other comprehensive (loss) income, net of tax 24,192         20,633                                     20,633 3,559         3,559
Balance at Sep. 30, 2013 569,828         493,084                   3         473,514   33,198   (13,631) 76,744   72,751   11,676 (7,683)
Balance, shares at Sep. 30, 2013                   100                                          
Interest in Gulf Wind retained by Pattern Development           (28,584)                             (18,332)   (13,122)   2,870 28,584   18,332   13,122 (2,870)
Assumption of liabilities related to Contribution Transactions (4,207)         (4,207)                             (4,207)                    
Deemed distribution for Contribution Transactions (232,640)         (232,640)                   (232,640)                              
Issuance of common stock 317,042 93       317,042 93     160   194     156 316,882 93   470,701     (450,975)   (20,076)              
Issuance of common stock, shares                   16,000,000 3,437 19,445,000     15,555,000                                
Issuance of Class A restricted common stock 156         156       1           155                              
Issuance of Class A restricted common stock, shares                   83,183                                          
Repurchase of shares for employee tax withholding (24)         (24)                   (24)                              
Repurchase of shares for employee tax withholding, shares                   (934)                                          
Stock-based compensation 263         263                   263                              
Dividends declared on Class A common stock (11,103)         (11,103)                   (11,103)                              
Acquisition from Pattern Development (57,852)         (57,852)                   (54,942)                 (2,910)            
Distribution to noncontrolling interest (866)                                                 (866)   (866)      
Net income (loss) (19,533)         (13,336)                                 (13,336)     (6,197)       (6,197)  
Other comprehensive (loss) income, net of tax 6,847         5,318                                     5,318 1,529         1,529
Balance at Dec. 31, 2013 568,004         468,210       355       156   489,388             (13,336)   (8,353) 99,794   90,217   18,601 (9,024)
Balance, shares at Dec. 31, 2013   35,530,786               35,530,786       15,555,000                                  
Issuance of common stock related to the public offering, net of issuance costs   286,819         286,819       108           286,711                            
Issuance of common stock related to the public offering, shares                     10,810,810                                        
Issuance of common stock       273         273                     273                      
Issuance of common stock, shares                         12,431                                    
Issuance of Class A restricted common stock 2,671         2,671       2           2,669                              
Issuance of Class A restricted common stock, shares                   175,915                                          
Repurchase of shares for employee tax withholding (380)         (380)                   (380)                              
Repurchase of shares for employee tax withholding, shares                   (11,780)                                          
Stock-based compensation 457         457                   457                              
Refund of issuance costs related to the IPO 163         163                   163                              
Dividends declared on Class A common stock (41,395) (41,395)       (41,395)                   (41,395)                              
Recognition of beneficial conversion feature on Class B convertible common stock (21,901)         (21,901)                   (21,901)                              
Acquisition from Pattern Development         35,259                                           35,259   35,259    
Adjustment to paid-in capital for beneficial conversion feature recognition 21,901         21,901                   21,901                              
Accretion of the Class B beneficial conversion feature 14,679         14,679                   14,679                              
Deemed dividends on Class B common shares     (14,679)         (14,679)                   (14,679)                          
Sale of Class A membership interests in Panhandle 1 210,250                                                 210,250   210,250      
Contribution from noncontrolling interest 2,550                                                 2,550   2,550      
Distribution to noncontrolling interest (1,470)                                                 (1,470)   (1,470)      
Net income (loss) (24,013)         (10,898)                                 (10,898)     (13,115)       (13,115)  
Other comprehensive (loss) income, net of tax (20,904)         (22,014)                                     (22,014) 1,110         1,110
Balance at Sep. 30, 2014 1,018,284         683,906       465       156   737,886             (24,234)   (30,367) 334,378   336,806   5,486 (7,914)
Balance, shares at Sep. 30, 2014   46,518,162               46,518,162       15,555,000                                  
Balance at Jun. 30, 2014                                                              
Dividends declared on Class A common stock   (15,258)                                                          
Net income (loss) (9,281)                                                            
Other comprehensive (loss) income, net of tax (4,283)                                                            
Balance at Sep. 30, 2014 $ 1,018,284                         $ 156                                  
Balance, shares at Sep. 30, 2014   46,518,162                       15,555,000