Summary Of Significant Accounting Policies - New Accounting Standards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total operating lease liabilities	$ 105,937	$ 152,608
Operating lease right-of-use assets	104,190	149,656
Long-term debt	305,010	349,563
Common stock	1,292,479	1,327,592
Retained earnings	411,072	464,524
Allowance for credit losses	1,477	3,469
Deferred tax liabilities	86,966	110,821
Net interest expense	(23,201)	(28,531)	$ (8,333)
Accounting Standards Update 2016-02 | Cumulative Effect, Period of Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total operating lease liabilities				$ 259,000
Operating lease right-of-use assets				253,400
Retained earnings				4,600
Tax effect of deferred gain on sale and leaseback transaction				$ 900
Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings			(600)
Tax effect of credit losses			(200)
Allowance for credit losses			$ 700
Accounting Standards Update 2020-06
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net interest expense	$ (7,600)
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term debt		44,100
Common stock		(41,500)
Retained earnings		6,700
Deferred tax liabilities		$ (9,300)