Facility Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of facility operating lease expense [Abstract]
Payments for Rent	$ 95,580	$ 94,722
Straight-line expense	3,935	2,801
Amortization of (above) below market rents, net	(1,733)	(1,959)
Amortization of deferred gain	(1,093)	(1,093)
Facility lease expense	$ 96,689	$ 94,471