Segment and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 segment	Mar. 31, 2013	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments	1
Net revenue	$ 177,235	$ 155,753
Percentage of revenue by geographic segments	100.00%	100.00%
Long-lived assets	1,143,516		1,148,267
Percentage of long-lived assets by geographic segments	100.00%		100.00%
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	167,480	144,196
Percentage of revenue by geographic segments	94.50%	92.60%
Long-lived assets	1,133,084		1,139,210
Percentage of long-lived assets by geographic segments	99.10%		99.20%
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	8,719	10,385
Percentage of revenue by geographic segments	4.90%	6.70%
Long-lived assets	9,769		9,035
Percentage of long-lived assets by geographic segments	0.80%		0.80%
Rest of world [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	1,036	1,172
Percentage of revenue by geographic segments	0.60%	0.70%
Long-lived assets	$ 663		$ 22
Percentage of long-lived assets by geographic segments	0.10%		0.00%