Other Operating Income And Expenses (Details) (USD $)	0 Months Ended	1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 31, 2013 store	Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2013	Aug. 31, 2013
Other Operating Income And Expenses [Abstract]
Loss on closure of Company Drive-Ins				$ 2,400,000	$ 2,400,000
Carrying value of assets at time of sale			38,400,000
Proceeds from sale			29,700,000
Notes receivable and direct financing leases from property dispositions					$ 8,661,000
Period in which remaining proceeds will be received		24 months
Number of Company Drive-Ins closed	12