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CONSOLIDATED STATEMENTS OF EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings (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, 2016 $ 3,702,750 $ 1,364 $ 3,109,394 $ (16,971) $ 9,496 $ 294,859 $ 304,608
Beginning balance (in shares) at Dec. 31, 2016   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 93,925     68,590   375 24,960
Change in fair value of derivative instruments 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 3,622,988 0 13,227 14,591 258,602
Ending balance (in shares) at Dec. 31, 2017 155,602,508 155,602,508          
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Cumulative adjustment related to adoption of ASU 2017-12 $ 0     (231) 230 1  
Contributions 2,691           2,691
Distributions (1,060)           (1,060)
Proceeds from sale of common stock, net of underwriters’ discount and transaction costs (173)   (173)        
Issuance of unrestricted stock 0            
Issuance of unrestricted stock (in shares)   43,900          
Shares withheld to satisfy tax withholding (693)   (693)        
Shares withheld to satisfy tax withholding (in shares)   (20,353)          
Declared dividend (39,351)     (39,173)   (178)  
Amortization of stock-based compensation 4,570   3,551     1,019  
Net income 52,404     48,904   177 3,323
Change in fair value of derivative instruments 9,513       9,479 34  
Ending Balance at Mar. 31, 2018 $ 3,938,865 $ 1,556 $ 3,625,673 $ 9,500 $ 22,936 $ 15,644 $ 263,556
Ending balance (in shares) at Mar. 31, 2018 155,626,055 155,626,055