Commitments and Contingencies (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) property	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) property	Jun. 30, 2015 USD ($)	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	$ 600	$ 600
Self Insurance Reserve	1,500		1,500		$ 1,800
Estimated Insurance Recoveries	12,652		12,652		13,238
Letters of Credit Outstanding, Amount	$ 3,500		$ 3,500		$ 3,500