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Shareholders' Equity - Additional Information (Details)
 1 Months Ended 7 Months Ended 12 Months Ended 92 Months Ended
Jun. 01, 2015
Jun. 04, 2014
officer
shares
Sep. 30, 2013
officer
shares
Sep. 09, 2010
shares
Apr. 21, 2010
shares
Dec. 31, 2017
USD ($)
vote
$ / shares
shares
Jan. 31, 2014
USD ($)
Dec. 31, 2017
USD ($)
vote
officer
$ / shares
shares
Dec. 31, 2017
USD ($)
vote
$ / shares
shares
Dec. 31, 2016
$ / shares
shares
Dec. 31, 2015
shares
Dec. 31, 2017
USD ($)
vote
$ / shares
shares
Stockholders Equity Note Disclosure [Line Items]                        
Common shares, shares authorized (up to) (in shares)           500,000,000   500,000,000 500,000,000 500,000,000   500,000,000
Common shares, par value (in dollars per share) | $ / shares           $ 0.01   $ 0.01 $ 0.01 $ 0.01   $ 0.01
Number of votes per common share | vote           1   1 1     1
Common shares, shares outstanding (in shares)           45,375,266   45,375,266 45,375,266 38,367,014   45,375,266
Additional common shares issued (in shares)                       41,956,000
Preferred shares, shares authorized (up to) (in shares)           100,000,000   100,000,000 100,000,000 100,000,000   100,000,000
Preferred shares, par value (in dollars per share) | $ / shares           $ 0.01   $ 0.01 $ 0.01 $ 0.01   $ 0.01
Preferred stock, shares outstanding (in shares)           0   0 0 0   0
Operating partnership common units held by unaffiliated third parties (in shares)           0   0 0 0   0
Long Term Incentive Plan Units                        
Stockholders Equity Note Disclosure [Line Items]                        
Operating partnership unit (in shares)           257,775   257,775 257,775 257,775   257,775
LTIP units achieving full parity (in shares)   231,525 26,250                  
Number of recipients | officer   2 1                  
Percent of units with full parity that have vested           100.00%   100.00% 100.00%     100.00%
Shares granted (in shares)       26,250 246,960       223,922 112,251 183,300  
Class A Performance LTIP Units                        
Stockholders Equity Note Disclosure [Line Items]                        
Operating partnership unit (in shares)           356,933   356,933 356,933 222,585   356,933
Distribution entitlement (in percentage) 10.00%                      
Long Term Incentive Plan Units, Time-Based, June 1 2017                        
Stockholders Equity Note Disclosure [Line Items]                        
Shares granted (in shares)                 128,859 118,791    
Long Term Incentive Plan Units, Time-Based                        
Stockholders Equity Note Disclosure [Line Items]                        
Operating partnership unit (in shares)           162,540   162,540 162,540 72,966   162,540
LTIP units achieving full parity (in shares)           593,948   593,948 593,948     593,948
Shares granted (in shares)                 223,922 112,251    
Number of officers | officer               6        
Award vesting percentage                 0.00% 33.00%    
DRSP Plan                        
Stockholders Equity Note Disclosure [Line Items]                        
Additional common shares issued (in shares)                 741,730 29,333,000    
Stock purchase plan, authorized amount | $           $ 50,000,000 $ 25,000,000          
Weighted average price per share (in dollars per share) | $ / shares                 $ 21.00 $ 21.22    
Remaining authorized repurchase amount | $           50,000,000   $ 50,000,000 $ 50,000,000     $ 50,000,000
ATM Plan                        
Stockholders Equity Note Disclosure [Line Items]                        
Additional common shares issued (in shares)                 2,147,695 880,820    
Stock purchase plan, authorized amount | $           100,000,000 $ 50,000,000          
Weighted average price per share (in dollars per share) | $ / shares                 $ 21.87 $ 23.54    
Remaining authorized repurchase amount | $           $ 100,000,000   $ 100,000,000 $ 100,000,000     $ 100,000,000