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Stock Compensation (Summary of Restricted Stock) (Details 5) - Restricted Stock [Member]
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Nonvested Restricted Stock Outstanding [Line Items]  
Nonvested at December 31, 2017 | shares 9,748,683
Weighted average grant-date fair value, December 31, 2017 | $ / shares $ 2.51
Granted | shares 4,651,571
Weighted average grant-date fair value, granted | $ / shares $ 4.62
Vested | shares (5,055,129)
Weighted average grant-date fair value, vested | $ / shares $ 2.81
Forfeited | shares (354,547)
Weighted average grant-date fair value, forfeited | $ / shares $ 3.43
Nonvested at December 31, 2018 | shares 8,990,578
Weighted average grant-date fair value, December 31, 2018 | $ / shares $ 3.40