Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Trademarks and other intangibles, accumulated amortization	$ 6,352	$ 4,593
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000us-gaap_CommonStockSharesAuthorized	75,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	29,229,000us-gaap_CommonStockSharesIssued	28,244,000us-gaap_CommonStockSharesIssued
Treasury stock, shares	1,101,000us-gaap_TreasuryStockShares	413,000us-gaap_TreasuryStockShares
Series A Junior Participating Preferred Stock [Member]
Finite-Lived Intangible Assets [Line Items]
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Convertible Preferred Stock [Member]
Finite-Lived Intangible Assets [Line Items]
Preferred stock, shares authorized	460,000	460,000
Preferred stock, shares issued	0	0
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 2,497	$ 2,414

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