XML 60 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholder's Equity (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jul. 19, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock, shares authorized   400,000,000   400,000,000   400,000,000
Common stock, par value   $ 0.01   $ 0.01   $ 0.01
Preferred stock, shares   100,000,000   100,000,000    
Preferred stock, par value   $ 0.01   $ 0.01    
Common stock, shares issued   58,379,493   58,379,493   55,368,737
Net proceeds of common share issuance       $ 107,991,000 $ 140,853,000  
Issuance of common stock, net of issuance costs       $ 112,902,000    
Common stock, shares outstanding   58,379,493   58,379,493   55,368,737
Non-vested restricted stock awards   357,018   357,018    
Common Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares repurchase program, authorized repurchase amount, shares   2,000,000   2,000,000    
Repurchased shares of stock pursuant to share repurchase authorization       0    
Issuance of common stock, net of issuance costs, Shares       3,091,020    
Issuance of common stock, net of issuance costs       $ 31,000    
Series A Preferred Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Preferred stock, shares issued   0   0   0
Preferred stock, shares outstanding   0   0   0
Dividend rate 7.75%          
Redemption date of Series A Preferred Stock Jul. 19, 2017          
Number of shares redeemed 1,840,000          
Redemption price of Series A Preferred Stock $ 25.00          
Accrued and unpaid dividends $ 0.096875          
Remaining balance of shares available   362,402   362,402    
$250 Million ATM Program [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock aggregate offering price, remaining       $ 230,800,000    
$200 Million ATM Program [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock aggregate offering price       200,000,000    
$150 Million ATM Program [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock aggregate offering price         $ 150,000,000  
Weighted average offering price per share     $ 32.05   $ 30.06  
Net proceeds of common share issuance     $ 88,100,000   $ 143,300,000  
Total compensation to the applicable sales agents     1,300,000   2,100,000  
Issuance of common stock, net of issuance costs     2,788,986   4,836,086  
$250 & $200 Million ATM Programs [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Net proceeds of common share issuance   $ 104,400,000   106,400,000    
Total compensation to the applicable sales agents   1,500,000   1,600,000    
Issuance of common stock, net of issuance costs   $ 2,826,167   $ 2,885,401    
LTIP [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average offering price per share       $ 34.50    
Issuance of common stock, net of issuance costs, Shares       195,963    
2010 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock, shares authorized   1,705,000   1,705,000    
Unrestricted Stock [Member] | Amended and Restated 2010 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrestricted common stock granted, shares       9,656    
Granted, Weighted Average Grant Date Fair Value       $ 37.29    
Compensation costs   $ 400,000 400,000 $ 400,000 400,000  
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Non-vested restricted stock awards   357,018   357,018   357,183
Unrestricted common stock granted, shares       27,003    
Granted, Weighted Average Grant Date Fair Value       $ 32.10    
Compensation costs   $ 400,000 $ 500,000 $ 900,000 $ 900,000  
Fair value of the restricted stock granted       $ 900,000    
Vesting period for the restricted stock       5 years    
Total unrecognized compensation costs related to restricted stock issuances   $ 4,600,000   $ 4,600,000    
Remaining weighted average period       2 years 8 months 12 days    
Maximum [Member] | $250 Million ATM Program [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock aggregate offering price       $ 250,000,000    
Maximum [Member] | 2010 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, Weighted Average Grant Date Fair Value       $ 32.10    
Minimum [Member[ | 2010 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, Weighted Average Grant Date Fair Value       14.20    
Weighted Average [Member] | $250 & $200 Million ATM Programs [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average offering price per share   $ 37.48   $ 37.43