XML 87 R67.htm IDEA: XBRL DOCUMENT v3.3.1.900
Equity Incentive Plan - Additional Information (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Jan. 15, 2016
shares
Jun. 01, 2015
measurement
$ / shares
shares
Jan. 30, 2015
Jun. 04, 2014
officer
shares
Jan. 31, 2014
Sep. 30, 2013
officer
shares
May. 17, 2013
shares
Sep. 09, 2010
shares
Apr. 21, 2010
shares
Jan. 31, 2015
shares
Jan. 31, 2014
shares
Jan. 31, 2013
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2013
USD ($)
$ / shares
shares
Dec. 31, 2012
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Compensation expense valuation of performance-based shares (in dollars per share) | $ / shares                         $ 21.21 $ 13.17 $ 10.93  
Total unrecognized compensation cost related to LTIP Units | $                         $ 2,166 $ 267    
Independent Trustees                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Trustee Fees | $                         $ 100 75 $ 75 $ 75
Common shares issued as compensation for services performed (in shares)                   14,113 16,542 22,536        
Independent Trustees | Subsequent Event                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Common shares issued as compensation for services performed (in shares) 26,488                              
Minimum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Trustee Fees, Paid In Shares, Percentage                         50.00%      
Maximum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Trustee Fees, Paid In Shares, Percentage                         100.00%      
Equity Incentive Plan                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Number of shares authorized             3,000,000                  
Equity Incentive Plan | Minimum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period for share awards under equity             3 years                  
Equity Incentive Plan | Maximum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period for share awards under equity             5 years                  
Class A Performance LTIP Units                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Dividends, portion upon declaration, percentage   10.00%                            
Dividends, portion upon fully vested, Percentage   90.00%                            
Distribution Entitlement, Percentage   10.00%                            
2010 Equity Incentive Plan                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Common shares available for issuance (in shares)                         2,013,791      
Number of trading days preceding the reporting date for which average of closing price of common shares is taken                         10 days      
Time-based Restricted Stock Awards                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period                         3 years      
Performance-based Restricted Stock Awards                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period                         3 years      
Dividend Yield     0.00%   0.00%   0.00%                  
Risk Free Interest Rate     0.84%   0.71%   0.43%                  
Restricted Stock                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Unrecognized compensation costs | $                         $ 2,131 1,458    
Weighted - average period for recognition of unrecognized compensation costs                         1 year 9 months 24 days      
Compensation expense recognized | $                         $ 1,594 $ 1,275 $ 966  
Shares granted (in shares)                         85,254 87,018 81,658  
Long Term Incentive Plan Units                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period for share awards under equity               5 years                
Weighted - average period for recognition of unrecognized compensation costs                         3 years 2 months 4 days      
Compensation expense recognized | $                         $ 691 $ 783 $ 783  
Exchange ratio                         1      
Shares granted (in shares)               26,250 246,960              
Shares forfeited (in shares)               15,435                
Percent of units with full parity that have vested                         100.00%      
Initial Award Vesting Rights, Percentage   50.00%                            
Annual Award Vesting Rights After Initial Portion, Percentage   25.00%                            
Termination Period Upon Change In Control   18 months                            
Dividend Yield   4.50%                            
Risk Free Interest Rate   0.95%                            
LTIP units achieving full parity (in shares)       231,525   26,250                    
Number of recipients | officer       2   1                    
Long Term Incentive Plan Units | Initial Vesting Period                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period   3 years                            
Long Term Incentive Plan Units | 1st Anniversary After Initial Period                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period   1 year                            
Long Term Incentive Plan Units | 2nd Anniversary After Initial Period                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Vesting period   2 years                            
Long Term Incentive Plan Units | Awarded June 1, 2015                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Shares granted (in shares)   183,300                            
Number Of Performance Measurements | measurement   2                            
Grants in Period, Intrinsic Value, Amount Per Share (in dollars per share) | $ / shares   $ 14.13                            
Long Term Incentive Plan Units, Absolute TSR Component                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Portion of Awards Granted, Percentage   60.00%                            
Long Term Incentive Plan Units, Absolute TSR Component | Minimum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Portion Of Awards To Be Granted If Conditions Are Met, Percentage   37.50%                            
Total Shareholder Return Threshold   25.00%                            
Long Term Incentive Plan Units, Absolute TSR Component | Maximum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Total Shareholder Return Threshold   50.00%                            
Long Term Incentive Plan Units, Relative TSR Component                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Portion of Awards Granted, Percentage   40.00%                            
Long Term Incentive Plan Units, Relative TSR Component | Minimum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Portion Of Awards To Be Granted If Conditions Are Met, Percentage   37.50%                            
Index Percentile Threshold   50.00%                            
Long Term Incentive Plan Units, Relative TSR Component | Maximum                                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                
Index Percentile Threshold   75.00%