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Share-Based and Other Compensation - Nonvested Restricted Stock (Details) - Restricted Stock [Member]
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
$ / shares
shares
Nonvested Restricted Stock Units RSU [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Granted (in shares) 0
Fair value per share on valuation date (in dollars per share) | $ / shares $ 0
Vested Restricted Stock Units RSU [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vested (in shares) (22,884)
Total Fair Value at Vest Date | $ $ 1,652