Summary of Significant Accounting Policies (Schedule of Deferred Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Customer Deposits and Store Credits, Beginning Balance	$ (37,836)	$ (47,633)	$ (41,571)	$ (40,332)
New Deposits	(264,473)	(302,429)	(545,326)	(594,262)
Recognition of Revenue	230,284	288,567	497,658	554,787
Sales Tax included in Customer Deposits	14,862	17,483	31,543	34,264
Other	1,671	1,124	2,204	2,655
Customer Deposits and Store Credits, Ending Balance	(55,492)	(42,888)	(55,492)	(42,888)
Net Services Sales
Recognition of Revenue	$ 20,229	$ 37,909	$ 48,821	$ 66,230

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration