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

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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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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Property, Equipment and Software (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, equipment and software, Gross	$ 75,976		$ 75,976		$ 60,543
Less accumulated depreciation	(11,375)		(11,375)		(9,279)
Property, equipment and software, Net	64,601		64,601		51,264
Depreciation	1,300	$ 904	2,511	$ 1,695
Non-cash long-lived asset impairment charge			686	$ 0
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Construction in Progress, Gross	35,131		35,131		22,418
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, equipment and software, Gross	13,250		13,250		12,450
Construction in Progress, Gross	58		58		76
Land [Member]
Property, Plant and Equipment [Line Items]
Property, equipment and software, Gross	3,105		3,105		3,101
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, equipment and software, Gross	17,137		17,137		17,082
Construction in Progress, Gross	149		149		826
Software [Member]
Property, Plant and Equipment [Line Items]
Property, equipment and software, Gross	6,030		6,030		4,696
Construction in Progress, Gross	1,251		1,251		138
Capitalized website and software development costs [Member]
Property, Plant and Equipment [Line Items]
Property, equipment and software, Gross	36,454		36,454		23,214
Construction in Progress, Gross	33,673		33,673		21,378
Other Capitalized Property Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Construction in Progress, Gross	$ 2,264		$ 2,264		$ 1,410