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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accounts receivable, allowance for doubtful accounts $ 703us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 2,022us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common stock, par value      
Common Stock, shares authorized 100,000,000us-gaap_CommonStockSharesAuthorized 100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued 83,741,918us-gaap_CommonStockSharesIssued 83,514,036us-gaap_CommonStockSharesIssued
Common stock, outstanding 83,741,918us-gaap_CommonStockSharesOutstanding 83,514,036us-gaap_CommonStockSharesOutstanding
Restricted Stock    
Common stock, issued 564,314us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember		 501,292us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember
Common stock, outstanding 564,314us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember		 501,292us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_RestrictedStockMember