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Incentive Compensation Plan Incentive Compensation Plan - Restricted Stock Awards Estimated to be Granted on a Performance Award (Details) - $ / shares
12 Months Ended
Feb. 21, 2019
Nov. 26, 2018
May 29, 2018
Mar. 26, 2018
Feb. 28, 2018
Feb. 26, 2018
Mar. 24, 2017
Feb. 23, 2017
Dec. 19, 2016
Sep. 30, 2016
Sep. 19, 2016
Jun. 07, 2016
Mar. 01, 2016
Mar. 01, 2016
Mar. 01, 2016
Feb. 18, 2016
Dec. 30, 2015
Jun. 26, 2015
Feb. 20, 2015
Feb. 05, 2015
Jan. 26, 2015
Jan. 15, 2015
Nov. 18, 2014
Apr. 08, 2014
Mar. 25, 2014
Mar. 05, 2014
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                          
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Target Award Participants Earn 40.00%       40.00%     40.00%               40.00%         40.00%                
Performance Shares Awards As Percentage Of Target 100.00%       100.00%     100.00%               100.00%         100.00%                
Percentage Of Target Award Opportunities Maximum In Certain Cases 200.00%       200.00%     200.00%               200.00%         200.00%                
Vesting period of restricted stock 0 years       0 years     0 years               0 years 0 years       0 years                
Performance Based Stock Awards Vesting Period 3 years       3 years     3 years               3 years 5 years       3 years                
Grant Price (in dollars per share)                                                     $ 14.22 $ 14.50 $ 12.99
Restricted Stock [Member]                                                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                          
Vesting period of restricted stock 1 year 1 year 1 year 1 year   1 year 1 year   3 years 1 year 3 years 1 year 1 year 1 year 1 year     1 year 1 year     1 year 1 year 3 years 1 year 1 year      
Common stock issued to executive 15,000 2,000 3,000 2,000   77,500     15,000 10,000 33,000 10,000 5,000 20,000 10,000     1,000 10,000     20,000 3,500 27,500 46,000 5,000      
Grant Price (in dollars per share) $ 14.22 $ 13.82 $ 15.44 $ 14.08   $ 14.49     $ 13.96 $ 10.09 $ 10.02 $ 9.34 $ 8.84 $ 8.84 $ 8.84   $ 9.18 $ 9.84 $ 8.45     $ 8.38 $ 9.26 $ 8.89 $ 9.18 $ 8.75      
Vesting Date Feb. 22, 2022 Nov. 26, 2021 May 29, 2021 Mar. 26, 2021   Feb. 26, 2021     Dec. 19, 2019 Sep. 30, 2019 Sep. 19, 2019 Jun. 07, 2019 Mar. 01, 2019 Aug. 31, 2017 Mar. 01, 2019     Jun. 26, 2018 Aug. 31, 2017     Jan. 15, 2017 Nov. 17, 2017 Apr. 08, 2017 Mar. 24, 2017 Mar. 04, 2017      
Restricted Stock [Member] | Long Term Incentive Plan [Member]                                                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                          
Vesting period of restricted stock                                       1 year                  
Common stock issued to executive                                       50,000                  
Grant Price (in dollars per share)                                       $ 8.55                  
Vesting Date                                       Feb. 05, 2018                  
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member]                                                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                          
Common stock issued to executive 121,900,000       102,000,000     93,500,000               160,650,000 60,000,000       125,000,000