Acquisitions (Details) - store	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Nevada | Parts Distribution Center [Member]
Business Acquisition [Line Items]
Number of stores purchased	1
Utah | Parts Distribution Center [Member]
Business Acquisition [Line Items]
Number of stores purchased	1
Maryland | Collision Centers [Member]
Business Acquisition [Line Items]
Number of stores purchased		1