Long-term Obligations Long-term Obligations - Property and Equipment, Lease Obligations(Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 815,928	$ 789,437
Fan Pier Leases | Building
Property, Plant and Equipment [Line Items]
Property and equipment, net	469,508	475,725
Construction financing lease obligation	471,797	472,070
San Diego Lease | Building
Property, Plant and Equipment [Line Items]
Property and equipment, net	116,738	94,602
Construction financing lease obligation	$ 93,879	$ 87,392