Franchise Arrangements (Schedule of Future Minimum Rent Payments Under Franchised Agreements) (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Franchise Arrangements [Line Items]
2018	$ 65,318
2019	62,054
2020	58,397
2021	52,809
2022	44,838
Thereafter	179,421
Total	462,837
Owned Sites [Member]
Franchise Arrangements [Line Items]
2018	5,651
2019	5,185
2020	4,782
2021	4,462
2022	3,795
Thereafter	18,561
Total	42,436
Leased Sites [Member]
Franchise Arrangements [Line Items]
2018	59,667
2019	56,869
2020	53,615
2021	48,347
2022	41,043
Thereafter	160,860
Total	$ 420,401

Franchise Arrangements [Line Items]

No definition available.

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- Definition

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

+ Details

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- Definition

Future rental payments receivable within one year of the balance sheet date under an operating lease.

+ References

+ Details

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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

+ References

+ Details

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- Definition

Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

+ References

+ Details

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- Definition

Future rental payments receivable within the third year from the balance sheet date under an operating lease.

+ References

+ Details

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- Definition

Future rental payments receivable within the second year from the balance sheet date under an operating lease.

+ References

+ Details

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- Definition

Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

+ References

+ Details

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- Details

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- Details

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