Commitments and Contingencies - Narrative (Details)		3 Months Ended	12 Months Ended
	Jul. 16, 2014 plaintiff	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jul. 12, 2013 USD ($)
Commitments and Contingencies (Textual) [Abstract]
Minimum period of lease including renewal options			5 years
Maximum period of lease including renewal options			35 years
Total rent expense			$ 76,700,000	$ 69,700,000	$ 67,600,000
Total rental income			1,100,000	1,200,000	1,000,000
Purchase commitments of products and services through 2019			30,000,000
Potential earnout payment			5,900,000
Earn-outs			3,500,000	3,200,000
Total outstanding holdbacks			6,500,000	4,700,000
Amount paid to sellers for unused portion of holdbacks			3,200,000	700,000	2,400,000
Gain on insurance proceeds		$ 4,500,000	4,523,000	0	$ 0
California Wildfire [Member]
Commitments and Contingencies (Textual) [Abstract]
Loss recorded in connection with unusual event				18,900,000
Insurance proceeds received				20,000,000
Gain from unusual event				1,100,000
Insurance receivable				$ 8,000,000
Gain on insurance proceeds			$ 4,500,000
Kimba Bradsbery and Cheri Brakensiek vs. Vicar Operating, Inc. [Member]
Commitments and Contingencies (Textual) [Abstract]
Number of plaintiffs | plaintiff	2
Carlos Lopez vs. Logistics Delivery Solutions, LLC [Member]
Commitments and Contingencies (Textual) [Abstract]
Settlement agreement maximum amount						$ 1,250,000
Accrued amount of settlement, percentage						50.00%