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Consolidated Statements of Cash Flows (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Statement of Cash Flows [Abstract]      
Tax refunds $ 393us-gaap_ProceedsFromIncomeTaxRefunds $ 311us-gaap_ProceedsFromIncomeTaxRefunds $ 1,834us-gaap_ProceedsFromIncomeTaxRefunds