Employee Benefits and Share-Based Compensation - Summary of Share Option Activity (Details) - 2009 Plan - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Number of Shares
Outstanding at beginning of period (in shares)	2,023,000
Granted (in shares)	0
Exercised (in shares)	0
Expired (in shares)	(117,000)
Forfeited (in shares)	(17,000)
Outstanding at end of period (in shares)	1,889,000	2,023,000
Exercisable at end of period (in shares)	1,766,000
Vested and expected to vest at end of period (in shares)	1,882,000
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 67.68
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Expired (in dollars per share)	73.88
Forfeited (in dollars per share)	62.81
Outstanding at end of period (in dollars per share)	67.35	$ 67.68
Exercisable at end of period (in dollars per share)	66.74
Vested and expected to vest at end of period (in dollars per share)	$ 67.30
Weighted-Average Remaining Years
Outstanding	4 years 4 months 24 days	4 years 7 months 6 days
Exercisable	4 years 4 months 24 days
Vested and expected to vest	4 years 4 months 24 days
Aggregate Intrinsic Value
Outstanding	$ 88	$ 1,013
Exercisable	88
Vested and expected to vest	$ 88