Property and Equipment (Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 592,739	$ 586,778
Accumulated depreciation and amortization	(231,127)	(209,763)
Property and equipment, net	361,612	377,015
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	79,412	81,940
Buildings and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	335,566	339,309
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	96,565	95,364
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	70,370	65,383
Assets Under Development [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 10,826	$ 4,782