Franchise arrangements - Schedule of Future Minimum Rent Payments Due to the Company Under Existing Franchised Agreements (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Franchise Arrangements [Line Items]
2021	$ 50,973
2022	45,106
2023	39,398
2024	34,236
2025	30,862
Thereafter	145,103
Total	345,678
Owned sites
Franchise Arrangements [Line Items]
2021	3,312
2022	2,648
2023	2,413
2024	2,321
2025	2,315
Thereafter	9,754
Total	22,763
Leased sites
Franchise Arrangements [Line Items]
2021	47,661
2022	42,458
2023	36,985
2024	31,915
2025	28,547
Thereafter	135,349
Total	$ 322,915

Franchise Arrangements [Line Items]

No definition available.

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- Definition

Amount of lease payments to be received by lessor for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981

+ Details

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- Definition

Amount of lease payment to be received by lessor for operating lease in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lease payment to be received by lessor for operating lease in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lease payment to be received by lessor for operating lease in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lease payment to be received by lessor for operating lease after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lease payment to be received by lessor for operating lease in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Amount of lease payment to be received by lessor for operating lease in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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