Subsequent Event (Narrative) (Details) - Subsequent Event - USD ($) $ / shares in Units, $ in Thousands	Nov. 04, 2021	Oct. 29, 2021
Subsequent Event
Dividends payable declared, per share	$ 0.25
Receivable Sale Amount, Maximum	$ 100,000
Subsequent Event, Description	we amended and restated our receivables purchase agreement (the "RPA") of our Securitization Program. Under the RPA, a receivables subsidiary may sell receivables to purchasers in amounts up to a $100,000 limit in exchange for cash so long as certain conditions have been satisfied. The parties subject to the RPA intend that the conveyance of receivables will constitute a purchase and sale of receivables and not a pledge for security. The receivables subsidiary has guaranteed to the purchasers and the agent the prompt payment of sold receivables, and to secure the prompt payment and performance of such guaranteed obligations, the receivables subsidiary has granted a security interest to the agent, for the benefit of the purchasers, in all assets of the receivables subsidiary. The RPA matures on November 4, 2024 and is subject to customary termination events related to transactions of this type. On November 4, 2021, the Board of Directors declared a $0.25 per share quarterly dividend payable on issued and outstanding shares of our Class A and Class B common stock on December 6, 2021 to shareholders of record at the close of business on November 19, 2021.	we amended our Securitization Program to extend the facility termination date to December 29, 2021 and changed the Administrator and Issuer to Wells Fargo Bank, N.A. Previously, the Securitization Program was to mature on October 29, 2021.
Subsequent Event, Date	Nov. 04, 2021	Oct. 29, 2021