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Employee Benefit Plans and Shareholder Rights Plan - Restricted Stock and Restricted Stock Units Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Balance, beginning of year, Number     1,443,897
Balance, beginning of year. Weighted Average Date Fair Value $ 16.20 $ 22.62 $ 23.27
Granted, Number 1,333,689 1,007,383 957,734
Granted, Weighted Average Fair Value $ 11.80 $ 10.23 $ 18.12
Vested, Number (601,830) (489,035) (495,527)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested $ 7,613 $ 5,821 $ 8,154
Vested, Weighted Average Fair Value $ 24.46 $ 25.55 $ 48.65
Forfeited, Number (239,946) (304,337) (164,769)
Forfeited, Weighted Average Fair Value $ 18.46 $ 18.13 $ 22.86
Balance, end of year, Number 2,447,259    
Balance, end of year. Weighted Average Fair Value $ 16.70 $ 16.20 $ 22.62
Performance Shares [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Minimum [Member] | Performance Shares [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Final Value $ 0