Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Allowance for sales credit memos	$ 1,762		$ 1,997
Preferred stock, shares authorized	1,000,000		1,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, shares authorized	100,000,000		100,000,000
Common stock, shares issued	76,305,000		76,324,000
Common stock, shares outstanding	76,305,000	[1]	76,324,000	[1]

[1] The number of common shares outstanding for all prior periods has been retroactively restated to reflect the Company's two-for-one common stock split effected in the form of a common stock dividend distributed on April 1, 2014