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Incentive Plans (Details 1)
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Restricted Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Non-vested-Beginning of year | shares 33,000
Granted | shares 36,000
Vested | shares (33,000)
Cancelled/Forfeited | shares
Expired | shares
Non-vested-End of year | shares 36,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Market Value at Grant Date [Roll Forward]  
Non-vested-Beginning of year | $ / shares $ 9.14
Granted | $ / shares 7.04
Vested | $ / shares 9.14
Cancelled/Forfeited | $ / shares
Expired | $ / shares
Non-vested-End of year | $ / shares $ 7.04
Restricted Stock Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Non-vested-Beginning of year | shares 234,000
Granted | shares 129,000
Vested | shares (36,000)
Cancelled/Forfeited | shares (17,000)
Expired | shares (11,000)
Non-vested-End of year | shares 299,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Market Value at Grant Date [Roll Forward]  
Non-vested-Beginning of year | $ / shares $ 9.57
Granted | $ / shares 6.35
Vested | $ / shares 10.86
Cancelled/Forfeited | $ / shares 9.5
Expired | $ / shares 13.23
Non-vested-End of year | $ / shares $ 7.88