Commitments and Contingencies (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) property	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) property	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Other Commitments [Line Items]
Number of Leased Properties Owned by Related Parties | property	2		2
Costs and Expenses, Related Party	$ 300	$ 300	$ 1,000	$ 1,000
Self Insurance Reserve	1,800		1,800		$ 1,800
Estimated Insurance Recoveries	14,191		14,191		13,238
Letters of Credit Outstanding, Amount	$ 3,500		$ 3,500		$ 3,500