Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Reserve for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 3,196		$ 1,824		$ 327
Cost and Expense	4,629		2,595		1,509
Other Accounts	0	[1]	70	[1]	0	[1]
Deductions	(908)	[2]	(1,293)	[2]	(12)	[2]
Ending Balance	6,917		3,196		1,824
Reserve for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	6,143		3,406		402
Cost and Expense	43,284		26,610		3,723
Other Accounts	0	[1]	0	[1]	0	[1]
Deductions	(37,526)	[2]	(23,873)	[2]	(719)	[2]
Ending Balance	$ 11,901		$ 6,143		$ 3,406

[1] Represents additions due to the reverse merger on December 13, 2011.

[2] Represents write-offs of specific accounts receivable and returns.