Share-Based Compensation - Nonvested Options (Details) - Nonvested Option Shares - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Nonvested Awards, Number of Shares [Roll Forward] | |||
| Nonvested awards, beginning balance (in shares) | 102,750 | 108,750 | 81,750 |
| Granted (in shares) | 42,000 | 36,000 | 66,000 |
| Vested (in shares) | (39,750) | (42,000) | (28,875) |
| Canceled (in shares) | 0 | 0 | (10,125) |
| Nonvested awards, ending balance (in shares) | 105,000 | 102,750 | 108,750 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Exercise Price [Roll Forward] | |||
| Nonvested options, beginning balance (in dollars per share) | $ 42.40 | $ 46.65 | $ 47.21 |
| Granted (in dollars per share) | 30.40 | 35.70 | 46.75 |
| Vested (in dollars per share) | 44.24 | 47.66 | 48.46 |
| Canceled (in dollars per share) | 0 | 0 | 46.66 |
| Nonvested options, ending balance (in dollars per share) | $ 36.90 | $ 42.40 | $ 46.65 |