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Stock-based Compensation Plans Grants Table (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 11,600  
Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 82,565 129,081
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 12.81 $ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 1,100 $ 1,500
Employee Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 35,325 40,286
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 2.24 $ 1.92
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 100 $ 100
Phantom Share Units (PSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 1,254 180,987
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 11.94 $ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 0 $ 2,100
Market Based Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 4,187 234,199
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 14.26 $ 15.39
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 100 $ 3,600
Equity Option    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares 8,115 423,405
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 3.08 $ 3.05
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 0 $ 1,300
Share-based Payment Arrangement, Tranche Two [Member] | Performance Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares   60,019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture   $ 700
Share-based Payment Arrangement, Tranche Three [Member] | Performance Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted, shares   84,483
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 11.86
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture   $ 1,000