Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2011
Statement of Financial Position [Abstract]
Allowances for accounts receivable	$ 755	$ 812
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued		0
Preferred stock, shares outstanding
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	57,425,064	58,153,665
Common stock, shares outstanding	57,425,064	58,153,665