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Accounts Receivable - Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Trade receivables $ 88,927us-gaap_AccountsReceivableGrossCurrent $ 86,402us-gaap_AccountsReceivableGrossCurrent
Other 2,335us-gaap_OtherReceivablesGrossCurrent 2,498us-gaap_OtherReceivablesGrossCurrent
Accounts receivable, gross 91,262lxu_AccountsReceivableCurrent 88,900lxu_AccountsReceivableCurrent
Allowance for doubtful accounts (860)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent (826)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accounts receivable, net $ 90,402us-gaap_AccountsReceivableNetCurrent $ 88,074us-gaap_AccountsReceivableNetCurrent