Employee Benefits - Change in Fair Value of Pension Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 229,701
Fair value of plan assets at ending of year	263,906	$ 229,701
Pension Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	229,701	283,940
Fair value of plan assets at ending of year	263,906	229,701
U.S. property separate account fund
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	28,468
Fair value of plan assets at ending of year	25,407	28,468
U.S. property separate account fund | Level 3 | Pension Benefits
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	28,468	27,328
Unrealized gains	(3,061)	1,140
Fair value of plan assets at ending of year	$ 25,407	$ 28,468