Leasehold Improvements, Equipment, Construction in Progress and Land, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Leasehold Improvements, Equipment and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 82,513		$ 82,513		$ 73,255
Less accumulated depreciation and amortization	(39,692)		(39,692)		(35,152)
Leasehold improvements, equipment and construction in progress, net	42,821		42,821		38,103
Land	2,299		2,299		2,299
Leasehold improvements, equipment, land and construction in progress, net	45,120		45,120		40,402
Depreciation expense	3,978	1,053	9,483	3,216
Gains (loss) on sale and abandonment of leasehold improvements and equipment	(846)	(12)	(1,517)	(56)
Equipment
Leasehold Improvements, Equipment and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	29,807		29,807		28,498
Equipment | Minimum
Leasehold Improvements, Equipment and Construction in Progress and Land, Net
Ranges of Estimated useful life			2 years
Equipment | Maximum
Leasehold Improvements, Equipment and Construction in Progress and Land, Net
Ranges of Estimated useful life			5 years
Software
Leasehold Improvements, Equipment and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	17,206		17,206		15,031
Software | Minimum
Leasehold Improvements, Equipment and Construction in Progress and Land, Net
Ranges of Estimated useful life			3 years
Software | Maximum
Leasehold Improvements, Equipment and Construction in Progress and Land, Net
Ranges of Estimated useful life			10 years
Vehicles
Leasehold Improvements, Equipment and Construction in Progress and Land, Net
Ranges of Estimated useful life			4 years
Leasehold Improvements, Equipment and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	7,860		7,860		9,353
Other
Leasehold Improvements, Equipment and Construction in Progress and Land, Net
Ranges of Estimated useful life			10 years
Leasehold Improvements, Equipment and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	515		515		367
Leasehold improvements
Leasehold Improvements, Equipment and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	21,445		21,445		17,920
Leasehold improvements | Maximum
Leasehold Improvements, Equipment and Construction in Progress and Land, Net
Ranges of Estimated useful life			10 years
Construction in progress
Leasehold Improvements, Equipment and Construction in Progress, Net
Leasehold improvements, equipment and construction in progress, gross	$ 5,680		$ 5,680		$ 2,086