Segment and Geographic Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | segment			1
Net revenue	$ 72,678	$ 172,401	$ 289,666	$ 533,410
Percentage of revenue by geographic segments	100.00%	100.00%	100.00%	100.00%
Long-lived assets	$ 1,385,802		$ 1,385,802		$ 1,227,285
Percentage of long-lived assets by geographic segments	100.00%		100.00%		100.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 68,746	$ 164,935	$ 274,771	$ 505,312
Percentage of revenue by geographic segments	94.60%	95.60%	94.90%	94.70%
Long-lived assets	$ 1,377,666		$ 1,377,666		$ 1,218,370
Percentage of long-lived assets by geographic segments	99.40%		99.40%		99.30%
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 3,495	$ 6,651	$ 13,132	$ 25,160
Percentage of revenue by geographic segments	4.80%	3.90%	4.50%	4.70%
Long-lived assets	$ 8,136		$ 8,136		$ 8,899
Percentage of long-lived assets by geographic segments	0.60%		0.60%		0.70%
Rest of world [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 437	$ 815	$ 1,763	$ 2,938
Percentage of revenue by geographic segments	0.60%	0.50%	0.60%	0.60%
Long-lived assets	$ 0		$ 0		$ 16
Percentage of long-lived assets by geographic segments	0.00%		0.00%		0.00%