CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Allowance for sales credit memos	$ 1,540		$ 1,997
Preferred stock, par value	$ 0.01		$ 0.01
Preferred stock, shares authorized	1,000,000		1,000,000
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Common stock, par value	$ 0.01		$ 0.01
Common stock, shares authorized	200,000,000		100,000,000
Common stock, shares issued	76,357,000		76,324,000
Common stock, shares outstanding	76,357,000	[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.