Benefit Plans - Plan Assets (Details) - Defined Benefit Pension Plans - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 61,618	$ 60,629	$ 82,914
Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	61,618	60,629
Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Cash and cash equivalents
Defined Benefit Plan Disclosure
Fair value of plan assets	264	244
Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	264	244
Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0	0
Equity securities: | Ecoservices Pension Equity Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	35.00%
Equity securities: | Ecoservices Hourly Pension Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	30.00%
U.S. investment funds
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 11,539	11,435
U.S. investment funds | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	11,539	11,435
U.S. investment funds | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
U.S. investment funds | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
International investment funds
Defined Benefit Plan Disclosure
Fair value of plan assets	7,546	7,803
International investment funds | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	7,546	7,803
International investment funds | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
International investment funds | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0	0
Fixed income securities: | Ecoservices Pension Equity Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	65.00%
Fixed income securities: | Ecoservices Hourly Pension Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	70.00%
Government securities
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 11,691	16,209
Government securities | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	11,691	16,209
Government securities | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Government securities | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Corporate bonds
Defined Benefit Plan Disclosure
Fair value of plan assets	30,578	24,938
Corporate bonds | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	30,578	24,938
Corporate bonds | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Corporate bonds | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0	$ 0