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Share-Based Compensation (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended
Feb. 28, 2013
Dec. 31, 2013
installments
plan
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of share-based compensation plans   2    
Number of shares authorized   10,400,000    
Share-based compensation expense   $ 2,682 $ 3,704 $ 1,687
Share-based compensation cost capitalized as part of real estate assets   202 128 166
Share-based compensation award, term to expiration   10 years    
Award vesting period   5 years    
Number of installments, at the end of award period   1    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]        
Unrecognized compensation cost related to nonvested stock awards   7,518    
Compensation cost to be recognized over a weighted average period   3 years 11 months    
Stock grants during the period 208,450      
Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total intrinsic value     177 509
Stock Awards [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Nonvested, beginning of period (in shares)   346,860    
Granted (in shares)   352,816    
Vested (in shares)   (209,470)    
Forfeited (in shares)   (11,990)    
Nonvested, end of period (in shares)   478,216 346,860  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]        
Weighted average grant-date fair value, nonvested, beginning of period (in dollars per share)   $ 18.72 $ 17.06  
Weighted average grant-date fair value, granted (in dollars per share)   $ 20.17 $ 19.09 $ 17.48
Weighted average grant-date fair value, vested (in dollars per share)   $ 18.41    
Weighted average grant-date fair value, forfeited (in dollars per share)   $ 18.45    
Total fair value of shares vested   $ 4,305 $ 4,573 $ 1,276