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Stock-Based Compensation - Long-Term Stock Award (Details) - Long-term stock awards - $ / shares
shares in Thousands
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Unvested stock award shares    
Balance at the beginning of the period (in shares) 608 1,125
Vested (in shares) 324 491
Forfeited (in shares) 10 18
Balance at the end of the period (in shares) 274 616
Weighted average grant date fair value    
Nonvested, weighted average grant date fair value. beginning of period (in dollars per share) $ 37 $ 36
Vested (in dollars per share) 37 34
Forfeited (in dollars per share) 37 37
Nonvested, weighted average grant date fair value. end of period (in dollars per share) $ 38 $ 37