Acquisitions - Intangibles Acquired (Details) - SEI $ in Thousands	Jul. 27, 2017 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 13,779
Weighted Average Life (in years)	5 years 1 month
Non-compete Agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 1,244
Weighted Average Life (in years)	5 years
Customer Lease Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 2,154
Weighted Average Life (in years)	1 year
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 3,215
Weighted Average Life (in years)	2 years
Reacquired Franchise Rights
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Fair Value	$ 3,640
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	$ 3,526
Weighted Average Life (in years)	11 years 4 months