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Restricted Stock Units (RSUs) (Schedule of Restricted Stock Units) (Details) - Restricted Stock Units (RSUs) [Member]
6 Months Ended
Jun. 30, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Non-vested grants, beginning balance 733,000
Forfeited (6,500)
Non-vested grants, ending balance 1,292,000 [1]
April 1, 2017 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vested (149,500)
Share price on vesting date | $ / shares $ 8.54
May 16, 2017 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vested (495,000)
Granted 495,000
Share price on vesting date | $ / shares $ 7.74
Share price on grant date | $ / shares $ 7.74
June 1 2017 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Granted 70,000
Share price on grant date | $ / shares $ 7.49
June 6, 2017 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Granted 645,000
Share price on grant date | $ / shares $ 8.23
[1] Following is the vesting schedule of RSUs.Vesting YearRSUs Vesting2017346,0002018178,2502019375,2502020231,2502021161,2501,292,000