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Stock-Based Compensation - Restricted Stock Units (Details) - RSU - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Awards      
Awards outstanding, beginning balance (in shares) 747,883 785,165 1,022,274
Issued (in shares) 132,721 292,638 277,711
Vested and restriction lapsed (in shares) (479,516) (319,541) (425,041)
Forfeited (in shares) (21,178) (10,379) (89,779)
Awards outstanding, ending balance (in shares) 379,910 747,883 785,165
Weighted Average Issue Price (in dollars per share)      
Awards outstanding - beginning balance (in dollars per share) $ 21.87 $ 18.02 $ 13.04
Issued (in dollars per share) 60.84 24.06 21.76
Vested and restriction lapsed (in dollars per share) 17.38 14.66 9.79
Forfeited (in dollars per share) 33.49 14.82 11.85
Awards outstanding - ending balance (in dollars per share) $ 35.50 $ 21.87 $ 18.02