Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Textuals (Details)

v3.6.0.2
Stock-Based Compensation Textuals (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jul. 31, 2015
Aug. 31, 2016
Jul. 31, 2016
May 31, 2016
Aug. 31, 2015
May 31, 2015
Dec. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2011
Nov. 30, 2016
Sep. 30, 2016
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized             $ 1,200 $ 1,200          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms               2 years          
Stock Issued During Period, Shares, Employee Stock Purchase Plan               465,000 558,000 659,000      
Executive Officer                          
Cash Bonus Paid               $ 1,392          
Restricted Stock                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period               374,298 431,008        
Weighted Average Grant Date Fair Value               $ 7.29 $ 17.82        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period               1,120,391 169,280        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number             159,634 159,634 905,727 643,999      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value               $ 10,079          
Allocated Share-based Compensation Expense               $ 6,097 $ 7,369 $ 4,151      
Restricted Stock | Share-based Compensation Award, Tranche One                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number             43,321 43,321          
Restricted Stock | Share-based Compensation Award, Tranche Two                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number             6,676 6,676          
Restricted Stock | Share-based Compensation Award, Tranche Three                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number             109,637 109,637          
Restricted Stock | Director                          
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   6,028              
Weighted Average Grant Date Fair Value       $ 8.93   $ 16.59              
Restricted Stock | Executive Officer                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 100,000 69,980 131,985 158,333 69,980 255,000              
Weighted Average Grant Date Fair Value $ 18.82 $ 7.55 $ 6.66 $ 7.55 $ 21.00 $ 16.59              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period       150,000                  
Restricted Stock | Executive Officer | 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                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   50.00%     50.00%                
Restricted Stock | Executive Officer | 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                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   50.00%     50.00%                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period             50,000            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number                         58,333
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               10,181 3,489        
Weighted Average Grant Date Fair Value               $ 9.82 $ 21.50        
Allocated Share-based Compensation Expense               $ 82 $ 61 87      
Restricted Stock Units (RSUs)                          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                     500,000    
Weighted Average Grant Date Fair Value                     $ 11.47    
Allocated Share-based Compensation Expense               $ 0 $ 249 $ 1,496      
2016 Fair Market Value Stock Purchase Plan                          
Employee Stock Ownership Plan (ESOP), Shares in ESOP                       500,000  
Stock Issued During Period, Shares, Employee Stock Purchase Plan               111,319