Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts receivable, allowances	$ 2,302	$ 3,393
Accumulated amortization on intangible assets	$ 4,159	$ 2,647
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	28,860,143	28,463,479
Common stock, shares outstanding	28,860,143	28,463,479
Treasury stock, shares	689,248	590,154