XML 68 R54.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equity and Noncontrolling Interest - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
 12 Months Ended
Feb. 22, 2018
Jan. 23, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Class of Stock [Line Items]          
Income attributable to noncontrolling interests     $ 12,505 $ 12,411 $ 11,441
Series D Cumulative Redeemable Preferred Stock          
Class of Stock [Line Items]          
Depositary shares outstanding (in shares)   3.0      
Net proceeds from shares sold   $ 72,600      
Liquidation preference (in usd per share)   $ 25.00      
Annual dividend on depositary shares (in usd per share)   $ 1.53125      
Percentage of redeemable preferred stock   6.125%      
Depository shares to cumulative redeemable preferred stock ratio     1.00%    
Dividend rate on preferred stock     6.125%    
Series C Cumulative Preferred Stock          
Class of Stock [Line Items]          
Depositary shares outstanding (in shares)     4.2    
Liquidation preference (in usd per share)     $ 25.00    
Annual dividend on depositary shares (in usd per share)     $ 1.71875    
Percentage of redeemable preferred stock     6.875%    
Stock redeemed during period (in shares) 3.0        
Depository shares to cumulative redeemable preferred stock ratio     1.00%    
Dividend rate on preferred stock     6.875%