Summary of Significant Accounting Policies (Narrative) (Details) a in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) a	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Principle Accounting Policies [Line Items]
Timber And Timberlands Acres Owned | a	2.2
Loss on disposal of property	$ 100,000	$ 1,700,000	$ 0
Gross carrying amount of long-lived intangible assets	11,400,000	8,400,000
Accumulated amortization	4,200,000	3,100,000
Indefinite-lived intangible assets, trade names	10,200,000	10,200,000
Impairment of intangible assets	$ 0	0	0
Defined benefit obligation of plan assets description	amortization of cumulative unrecognized net actuarial gains and losses – generally in excess of 10 percent of the greater of the benefit obligation or market-related value of plan assets at the beginning of the year – over the average remaining service period of the active employee group covered by the plan.
Variable Rate Term Loans [Member]
Principle Accounting Policies [Line Items]
Term loan debt	$ 403,500,000
Designated as Hedging Instrument [Member]
Principle Accounting Policies [Line Items]
Derivative Fair Value Of Derivative Net	0	0
Customer Relationships [Member]
Principle Accounting Policies [Line Items]
Intangible asset acquired	3,000,000.0
Customer Relationships and Trade Names [Member]
Principle Accounting Policies [Line Items]
Amortization expense	$ 1,100,000	800,000	$ 800,000
Intangible Assets, Amortization Period [Member] | Customer Relationships [Member]
Principle Accounting Policies [Line Items]
Finite-lived intangible asset, useful life	3 years
Intangible Assets, Amortization Period [Member] | Trade Names [Member]
Principle Accounting Policies [Line Items]
Finite-lived intangible asset, useful life	20 years
Minimum [Member]
Principle Accounting Policies [Line Items]
Operating leases, options to extend leases term	1 year
Maximum [Member]
Principle Accounting Policies [Line Items]
Operating leases, options to extend leases term	5 years
Timber and Timberlands [Member] | Minimum [Member]
Principle Accounting Policies [Line Items]
Timber volume estimate, review period	5 years
Property, plant and equipment, useful life	5 years
Timber and Timberlands [Member] | Maximum [Member]
Principle Accounting Policies [Line Items]
Timber volume estimate, review period	10 years
Property, plant and equipment, useful life	20 years
Ola, Arkansas Sawmill [Member]
Principle Accounting Policies [Line Items]
Write off of property and equipment		$ 9,500,000