Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Reserve for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 6,917		$ 3,196		$ 1,824
Cost and Expense	5,958		4,629		2,595
Other Accounts	0	[1]	0	[1]	70	[1]
Deductions	(2,141)	[2]	(908)	[2]	(1,293)	[2]
Ending Balance	10,734		6,917		3,196
Reserve for Sales Returns [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	11,901		6,143		3,406
Cost and Expense	47,914		43,284		26,610
Other Accounts	0	[1]	0	[1]	0	[1]
Deductions	(43,770)	[2]	(37,526)	[2]	(23,873)	[2]
Ending Balance	$ 16,045		$ 11,901		$ 6,143

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

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