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1. Significant Accounting Policies Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Cost of Goods and Services Sold	$ 1,107,804	$ 1,054,663	$ 1,066,264
Retained earnings	$ 9,268,012	$ 5,470,779
Revenue Allocation Percent To Lease Elements	3.00%	3.00%	5.00%
Deferred Revenue	$ 60,000	$ 45,800
Deferred revenue	$ 42,468	$ 33,735

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

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Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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