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Stockholders' Equity - Summary of Certain Information with Respect to the Performance Share Awards (Details) - Performance Shares [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair Value $ 13,811    
Accrual 11,633    
Expense $ 6,425 $ 7,063 $ 6,715
Long-Term Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Issuance of common stock, net of issuance costs (in shares) 196,087    
January 1, 2018 - December 31, 2020 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair Value $ 6,521    
Accrual 4,343    
Expense 3,208 1,135  
January 1, 2017 - December 31, 2019 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair Value 7,290    
Accrual 7,290    
Expense 3,217 2,540 1,532
January 1, 2016 - December 31, 2018 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expense   3,388 2,189
January 1, 2016 - December 31, 2018 [Member] | Long-Term Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Accrual $ 7,300    
Issuance of common stock, net of issuance costs (in shares) 135,494    
January 1, 2015 - December 31, 2017 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expense     2,994
January 1, 2019 - December 31, 2021 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair Value $ 4,829    
Expense $ 1,610 $ 0 $ 0