Incentive Plans - Schedule of Restricted Stock Unit Activity (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) $ / shares shares
2013 Plan — Employee RSUs and PSUs | RSUs | Employees
Number of Units
Beginning balance (in shares) | shares	98,214
Granted (in shares) | shares	29,467
Vested (in shares) | shares	(38,968)
Issued (in shares) | shares	(38,968)
Forfeited (in shares) | shares	(6,798)
Ending balance (in shares) | shares	81,915
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning balance (in dollars per share) | $ / shares	$ 285.60
Granted (in dollars per share) | $ / shares	462.80
Vested (in dollars per share) | $ / shares	212.35
Issued (in dollars per share) | $ / shares	212.35
Forfeited (in dollars per share) | $ / shares	386.91
Ending balance (in dollars per share) | $ / shares	$ 376.60
Total Fair Value
Total fair value vested | $	$ 17.9
Total fair value issued | $	17.9
Total fair value, outstanding | $	$ 33.1
2013 Plan — Employee RSUs and PSUs | Employee PSUs | Employees
Number of Units
Beginning balance (in shares) | shares	77,395
Granted (in shares) | shares	49,371
Vested (in shares) | shares	(61,288)
Issued (in shares) | shares	(61,288)
Forfeited (in shares) | shares	(5,874)
Ending balance (in shares) | shares	59,604
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning balance (in dollars per share) | $ / shares	$ 320.05
Granted (in dollars per share) | $ / shares	583.25
Vested (in dollars per share) | $ / shares	221.39
Issued (in dollars per share) | $ / shares	221.39
Forfeited (in dollars per share) | $ / shares	466.58
Ending balance (in dollars per share) | $ / shares	$ 438.28
Total Fair Value
Total fair value vested | $	$ 29.7
Total fair value issued | $	29.7
Total fair value, outstanding | $	$ 24.1
2013 Directors Plan | 2023 Plan — RSUs and Director DSUs | Non-employee directors
Number of Units
Beginning balance (in shares) | shares	9,436
Granted (in shares) | shares	12
Vested (in shares) | shares	(7,174)
Issued (in shares) | shares	(7,174)
Ending balance (in shares) | shares	2,274
Weighted Average Grant Date Fair Value (in dollars per share)
Beginning balance (in dollars per share) | $ / shares	$ 196.38
Granted (in dollars per share) | $ / shares	406.93
Vested (in dollars per share) | $ / shares	175.84
Issued (in dollars per share) | $ / shares	175.84
Ending balance (in dollars per share) | $ / shares	$ 261.51
Total Fair Value
Total fair value vested | $	$ 3.5
Total fair value issued | $	3.5
Total fair value, outstanding | $	$ 0.9