Organization and Summary of Significant Accounting Policies (Property, Equipment and Furnishings and Restricted Cash) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Restricted Cash
Minimum amount of cash from maintenance reserve payments required to be held in restricted cash account	$ 9.0
Projected maintenance obligation period	6 months
Minimum
Property, Equipment and Furnishings
Useful life of property, equipment and furnishings	3 years
Maximum
Property, Equipment and Furnishings
Useful life of property, equipment and furnishings	15 years