Subsequent Events (Details) $ in Thousands		3 Months Ended
	Apr. 01, 2018 USD ($) store	Mar. 31, 2018 USD ($) store	Mar. 31, 2017 USD ($)
Subsequent Event [Line Items]
Number of stores acquired | store		1
Cash Paid		$ 70,171	$ 25,541
Purchase price to acquire real estate		$ 70,787	$ 25,556
Subsequent Event
Subsequent Event [Line Items]
Number of stores acquired | store	1
Purchase price to acquire real estate	$ 16,250
Corporate Joint Venture | Subsequent Event
Subsequent Event [Line Items]
Number of stores acquired | store	14
Cash Paid	$ 204,000
Purchase price to acquire real estate	$ 225,000