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Revenue Recognition - Changes in Contract Liabilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Change in Contract with Customer, Liability [Roll Forward]
Outstanding at January 1, 2021	$ 983
Increase (decrease) attributed to:
Customer loyalty net deferrals	258
Customer loyalty redemptions	(257)
Outstanding at March 31, 2021	$ 984

X

- Definition

Change in Contract with Customer, Liability [Roll Forward]

+ References

No definition available.

+ Details

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- Definition

Contract With Customer, Liability, Including New Contract Revenue

+ References

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- Definition

Increase (Decrease) in Contract Liabilities [Abstract]

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No definition available.

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- Definition

Revenue from Contract with Customer. Liability, Increase From Customer Loyalty Net Deferrals

+ References

No definition available.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044

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