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Stock-Based Compensation Textuals (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2016
Jun. 30, 2016
May 31, 2016
May 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 1,645     $ 1,645   $ 1,645    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms             1 year 7 months    
Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period [1]             172,333    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value             $ 7.66    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number [1]   182,977     182,977   182,977   905,727
Allocated Share-based Compensation Expense         $ 2,553 $ 1,515 $ 4,266 $ 2,314  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value             7,485    
Restricted Stock Units (RSUs)                  
Allocated Share-based Compensation Expense         0 0 0 249  
Partnership Restricted Units                  
Allocated Share-based Compensation Expense         $ 18 $ 15 $ 28 $ 20  
Director | Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     14,000            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 8.93            
Director | Partnership Restricted Units                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   2,528 7,653            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 9.89 $ 9.80            
Executive Officer | Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     158,333 100,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 7.55 $ 18.82          
Executive Officer | Restricted Stock | Scenario, Forecast                  
Share-based Compensation Arrangement by Share-based Payment Award, Other Share Increase (Decrease) 150,000                
Executive Officer | Restricted Stock | Share-based Compensation Award, Tranche One                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     100,000            
Executive Officer | Restricted Stock | Share-based Compensation Award, Tranche Two                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     58,333            
Executive Officer | Restricted Stock | Share-based Compensation Award, Tranche Two | Scenario, Forecast                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 50,000                
Executive Officer | Restricted Stock | Share-based Compensation Award, Tranche Two | Scenario, Actual                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number   58,333     58,333   58,333    
[1] These amounts do not reflect the surrendering of shares in July 2016 described above.