Property and Equipment (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 994,198,000us-gaap_PropertyPlantAndEquipmentGross	$ 1,005,246,000us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation	(278,386,000)	(308,335,000)
Total property and equipment, net	715,812,000us-gaap_PropertyPlantAndEquipmentNet	696,911,000us-gaap_PropertyPlantAndEquipmentNet
Capital leased assets, gross	85,600,000us-gaap_CapitalLeasedAssetsGross	76,400,000us-gaap_CapitalLeasedAssetsGross
Capital leases accumulated depreciation	13,100,000	3,800,000
Depreciation and amortization expense	62,300,000us-gaap_Depreciation	47,300,000us-gaap_Depreciation	35,700,000us-gaap_Depreciation
Buildings
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	531,642,000	506,056,000
Depreciation and amortization expense	13,400,000
Furniture and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	202,846,000	190,555,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	99,942,000	163,019,000
Software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	113,875,000	102,520,000
Less: accumulated depreciation	(1,200,000)	(500,000)
Total property and equipment, net	11,200,000	5,500,000
Computers
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 45,893,000	$ 43,096,000

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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