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Share-Based Payments (Summary of the Status of the Company's Employee Stock Option Grants) (Details) - Employee stock options
 12 Months Ended
Dec. 31, 2023
$ / shares
shares
Shares  
Outstanding (in shares) | shares 2,206,369
Granted (in shares) | shares 0
Exercised (in shares) | shares (349,749)
Forfeited (in shares) | shares 0
Expired (in shares) | shares (156,288)
Outstanding (in shares) | shares 1,700,332
Exercisable (in shares) | shares 1,700,332
Weighted Average Exercise Price  
Outstanding (in dollars per share) | $ / shares $ 92.67
Granted (in dollars per share) | $ / shares 0.00
Exercised (in dollars per share) | $ / shares 73.87
Forfeited (in dollars per share) | $ / shares 0.00
Expired (in dollars per share) | $ / shares 106.91
Outstanding (in dollars per share) | $ / shares 95.22
Exercisable (in dollars per share) | $ / shares $ 95.22
Assurance IQ  
Shares  
Outstanding (in shares) | shares 53,768
Granted (in shares) | shares 0
Exercised (in shares) | shares (32,750)
Forfeited (in shares) | shares (1,278)
Expired (in shares) | shares (1,382)
Outstanding (in shares) | shares 18,358
Exercisable (in shares) | shares 16,949
Weighted Average Exercise Price  
Outstanding (in dollars per share) | $ / shares $ 1.49
Granted (in dollars per share) | $ / shares 0.00
Exercised (in dollars per share) | $ / shares 1.17
Forfeited (in dollars per share) | $ / shares 6.86
Expired (in dollars per share) | $ / shares 3.74
Outstanding (in dollars per share) | $ / shares 1.53
Exercisable (in dollars per share) | $ / shares $ 1.48