Valuation and Qualifying Accounts

3 Months Ended

Mar. 31, 2013

Valuation and Qualifying Accounts [Abstract]

VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS

	Sales Return Reserve
(in thousands) For the year ended	Balance at Beginning of Year		Additions Charged Against Revenue		Deductions		Balance at End of Year
March 31, 2013	$	2,229	$	4,277	$	—	$	6,506
March 31, 2012	$	1,726	$	503	$	—	$	2,229
March 31, 2011	$	961	$	765	$	—	$	1,726

	Allowance for Doubtful Accounts
(in thousands) For the year ended	Balance at Beginning of Year		Additions Charged to Costs and Expenses		Deductions			Balance at End of Year
March 31, 2013	$	8,481	$	6,885	$	(3,543	)	$	11,823
March 31, 2012	$	6,717	$	5,715	$	(3,951	)	$	8,481
March 31, 2011	$	4,489	$	3,780	$	(1,552	)	$	6,717