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Stockholders' Equity and Noncontrolling Interest - Additional Information (Detail)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Nov. 12, 2014
USD ($)
shares
Feb. 12, 2013
USD ($)
quarter
$ / shares
shares
Mar. 31, 2013
Nov. 30, 2003
quarter
$ / shares
shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Class of Stock [Line Items]              
Income attributable to noncontrolling interests | $         $ 11,441 $ 10,463 $ 11,045
Series A Preferred Stock              
Class of Stock [Line Items]              
Number of depositary shares sold | shares       4,000,000      
Depository shares to cumulative redeemable preferred stock ratio       1.00%      
Dividend rate on preferred stock       8.00%      
Depositary shares, redeemable price (in usd per share)       $ 25.00      
Annual dividend on depositary shares (in usd per share)       2.00      
Liquidation preference (in USD per share)       $ 25.00      
Number of quarters without dividends for voting eligibility | quarter       6      
Percentage of redeemable preferred stock     60.00%        
Series C Preferred Stock              
Class of Stock [Line Items]              
Number of depositary shares sold | shares 1,600,000 5,600,000          
Depository shares to cumulative redeemable preferred stock ratio   1.00%          
Dividend rate on preferred stock   6.875%          
Annual dividend on depositary shares (in usd per share)   $ 1.71875          
Liquidation preference (in USD per share)   $ 25.00          
Number of quarters without dividends for voting eligibility | quarter   6          
Percentage of redeemable preferred stock   6.875%          
Cash proceeds from sale of stock | $ $ 39,300 $ 135,200     $ 0 $ 0 $ 39,260