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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 28, 2015
Dec. 31, 2014
Preferred stock, shares authorized 100,000,000us-gaap_PreferredStockSharesAuthorized 100,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (in dollars per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 300,000,000us-gaap_CommonStockSharesAuthorized 300,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 80,563,291us-gaap_CommonStockSharesIssued 80,563,291us-gaap_CommonStockSharesIssued
Common stock held in treasury, shares 2,805,370us-gaap_TreasuryStockShares 2,541,306us-gaap_TreasuryStockShares
Series A convertible preferred stock    
Preferred stock, shares authorized 10,896,250us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember
10,896,250us-gaap_PreferredStockSharesAuthorized
/ us-gaap_StatementClassOfStockAxis
= us-gaap_ConvertiblePreferredStockMember