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Stock-Based Compensation (Summary of Restricted Stock Transactions) (Details)
12 Months Ended
Dec. 31, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Non-vested shares outstanding at beginning of period (in shares) 1,820,159
Non-vested shares outstanding at end of period (in shares) 1,284,206
Time-vesting  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Awarded (in shares) 221,042
Released (in shares) (418,426)
Forfeitures (in shares) (284,247)
Performance-based  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Awarded (in shares) 170,036
Released (in shares) (224,358)
Forfeitures (in shares) 0