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Stock-Based Compensation Time Vested Deferred Stock Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 14 days    
Document Fiscal Year Focus 2016    
Amended and Restated 2004 Omnibus Stock Plan | Time-Vested Deferred Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding non-vested beginning balance (in shares) 728 491 379
Granted 598 335 378
Vested (182) (65) (102)
Cancelled (in shares) (208) (33) (164)
Outstanding non-vested ending balance (in shares) 936 728 491
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Outstanding non-vested Weighted-Average Grant Date Fair Value, begining blance (in dollars per share) $ 13.60 $ 15.33 $ 14.69
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) 6.83 11.70 14.70
Vested, Weighted-Average Grant Date Fair Value (in dollars per share) 14.79 16.61 13.80
Cancelled, Weighted-Average Grant Date Fair Value (in dollars per share) 12.85 14.09 17.11
Outstanding non-vested Weighted-Average Grant Date Fair Value, ending blance (in dollars per share) $ 9.21 $ 13.60 $ 15.33
Outstanding at year end, Weighted-Average Remaing Contractual Life (in years) 3 years 1 month 6 days    
Dividend Participation $ 176 $ 429 $ 217
Closing market price per share $ 7.40 $ 6.76 $ 17.71
Equivalent shares at closing market price 24 63 12