Acquisitions - Intangibles Acquired (Details) - SEI $ in Thousands	Jul. 27, 2017 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 16,472	[1]
Weighted Average Life (in years)	3 years 3 months 18 days
Non-compete Agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 1,155
Weighted Average Life (in years)	5 years
Customer Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 2,527
Weighted Average Life (in years)	1 year
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 3,960
Weighted Average Life (in years)	2 years
Reacquired Franchise Rights
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 3,231
Weighted Average Life (in years)	4 years 1 month 6 days
Favorable Operating Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 5,599
Weighted Average Life (in years)	4 years 7 months 6 days

[1] Acquired definite-lived intangible assets have a total weighted average life of 3.3 years.