Acquisitions Divestitures (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts Receivable, before Allowance for Credit Loss, Current		$ 61,623	$ 61,675
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		(417,479)	(368,743)
Discontinued Operation, Tax Effect of Discontinued Operation		0	(153)	$ (1,416)
Disposal Group, Including Discontinued Operation, Assets, Current		173,135	136,431
Deferred Income Tax Expense (Benefit)	[1]	26,599	24,200	23,904
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		$ 0	$ 170	$ 5,402

[1] (1) Includes $8.2 million, $4.9 million, and $4.7 million of deferred state income taxes for the years 2021, 2020 and 2019, respectively.