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Consolidated Statements of Equity - USD ($)
$ in Thousands
Total
Common Stock
Series B Redeemable Preferred Stock
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive (Loss) Income
Non-controlling interest—Units in the operating partnership
Non-controlling interest—Members in Consolidated Entities
Beginning balance at Dec. 31, 2014 $ 1,275,015 $ 668 $ 145,000 $ 1,070,833 $ (34,884) $ (2,443) $ 52,851 $ 42,990
Beginning balance (in shares) at Dec. 31, 2014   66,797,816            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Contributions 217,795             217,795
Distributions (2,013)             (2,013)
Proceeds from sale of common stock, net of underwriters’ discount and transaction costs 380,620 $ 127   380,493        
Proceeds from sale of common stock, net of underwriters' discount and transaction costs (in shares)   12,650,000            
Redemption of Series B preferred stock (145,000)   (145,000)          
Issuance of common units for acquisition properties 1,814,936           1,814,936  
Issuance of unrestricted stock 285,445 $ 87   285,358        
Issuance of unrestricted stock (in shares)   8,820,482            
Issuance of restricted stock 0              
Issuance of restricted stock (in shares)   36,223            
Shares withheld to satisfy tax withholding (5,128)     (5,128)        
Shares withheld to satisfy tax withholding (in shares)   (85,469)            
Declared dividend (87,344)   (11,469) (50,244)     (25,631)  
Amortization of stock-based compensation 8,832     8,832        
Net income (loss) (16,718)   11,469   (10,071)   (21,969) 3,853
Change in fair value of derivatives 2,597         1,362 1,235  
Exchange of common units in the operating partnership for common stock 0 $ 9   20,835     (20,844)  
Exchange of Non-controlling Interests — common units in the operating partnership for common stock (in shares)   934,728            
Change in fair value of derivatives 2,597              
Ending balance at Dec. 31, 2015 3,729,037 $ 891 0 1,710,979 (44,955) (1,081) 1,800,578 262,625
Ending balance (in shares) at Dec. 31, 2015   89,153,780            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Contributions 33,996             33,996
Distributions (1,303)             (1,303)
Proceeds from sale of common stock, net of underwriters’ discount and transaction costs 1,449,581 $ 470   1,449,111        
Proceeds from sale of common stock, net of underwriters' discount and transaction costs (in shares)   47,010,695            
Issuance of unrestricted stock 6 $ 6            
Issuance of unrestricted stock (in shares)   590,520            
Shares withheld to satisfy tax withholding (8,427) $ (3)   (8,424)        
Shares withheld to satisfy tax withholding (in shares)   (262,760)            
Declared dividend (117,819)     (90,005)     (27,814)  
Amortization of stock-based compensation 14,654     13,609     1,045  
Net income (loss) 43,122       27,984   5,848 9,290
Change in fair value of derivatives 5,942         10,577 (4,635)  
Redemption of common units in the operating partnership (1,446,039)     34,124     (1,480,163)  
Ending balance at Dec. 31, 2016 $ 3,702,750 $ 1,364 0 3,109,394 (16,971) 9,496 294,859 304,608
Ending balance (in shares) at Dec. 31, 2016 136,492,235 136,492,235            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Contributions $ 3,870             3,870
Distributions (74,836)             (74,836)
Proceeds from sale of common stock, net of underwriters’ discount and transaction costs 647,382 $ 187   647,195        
Proceeds from sale of common stock, net of underwriters' discount and transaction costs (in shares)   18,656,575            
Issuance of unrestricted stock 0 $ 9   (9)        
Issuance of unrestricted stock (in shares)   917,086            
Shares withheld to satisfy tax withholding (16,041) $ (4)   (16,037)        
Shares withheld to satisfy tax withholding (in shares)   (463,388)            
Declared dividend (158,544)     (106,269) (51,619)   (656)  
Amortization of stock-based compensation 15,915     13,249     2,666  
Net income (loss) 93,925       68,590   375 24,960
Change in fair value of derivatives 1,500              
Change in fair value of derivatives 7,398         7,353 45  
Redemption of common units in the operating partnership (310,855)     (24,535)   (3,622) (282,698)  
Ending balance at Dec. 31, 2017 $ 3,910,964 $ 1,556 $ 0 $ 3,622,988 $ 0 $ 13,227 $ 14,591 $ 258,602
Ending balance (in shares) at Dec. 31, 2017 155,602,508 155,602,508