Employee Benefit Plans - Funded Status of Pension Plan and Post-Retirement Medical Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	$ 195,485	$ 202,963
Service cost	2,886	3,323	$ 3,196
Interest cost	10,766	10,241	10,142
Actuarial (gain) loss	1,943	(10,932)
Benefits/expenses paid	(10,359)	(10,110)
Projected benefit obligation at end of year	200,721	195,485	202,963
Changes in Plan Assets:
Fair value of plan assets at beginning of year	217,162	205,305
Actual return on plan assets	33,024	19,066
Contributions	3,424	2,902
Benefits/expenses paid	(10,360)	(10,111)
Fair value of plan assets at end of year	243,250	217,162	205,305
Funded Status:
Overfunded/(underfunded) amount recognized	42,529	21,677
Post-Retirement Medical Benefits
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	1,882	1,965
Service cost	107	128	130
Interest cost	90	98	106
Actuarial (gain) loss	(132)	(45)
Benefits/expenses paid	(285)	(264)
Projected benefit obligation at end of year	1,662	1,882	1,965
Changes in Plan Assets:
Fair value of plan assets at beginning of year	14,456	12,827
Actual return on plan assets	1,848	1,894
Contributions	272	256
Benefits/expenses paid	(557)	(521)
Fair value of plan assets at end of year	16,019	14,456	$ 12,827
Funded Status:
Overfunded/(underfunded) amount recognized	$ 14,357	$ 12,574