1.0.0.3 false Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 Consolidated Balance Sheets (Parentheticals) [Abstract] 0 us-gaap_StatementOfFinancialPositionAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 3 Margin deposit assets in discontinued operations 1 rri_MarginDepositAssetsInDiscontinuedOperations rri false debit instant monetary Carrying amount as of the balance sheet date, included in discontinued operations, of cash placed with a broker, futures... false false false false false false false false false 1 true true 55855000 55855 false false 2 true true 295477000 295477 false false Carrying amount as of the balance sheet date, included in discontinued operations, of cash placed with a broker, futures clearing merchant or counterparty as security for a trading, derivative or non-derivative position and/or accounts payable. No authoritative reference available. false 4 Investments accounted for at fair value 1 rri_InvestmentsAccountedForAtFairValue rri false debit instant monetary This item represents trading and available-for-sale securities, which are valued based upon unadjusted quoted prices. false false false false false false false false false 1 false true 33793000 33793 false false 2 false true 29012000 29012 false false This item represents trading and available-for-sale securities, which are valued based upon unadjusted quoted prices. No authoritative reference available. false 5 Margin deposit liabilities in discontinued operations 1 rri_MarginDepositLiabilitiesInDiscontinuedOperations rri false debit instant monetary Carrying amount as of the balance sheet date, included in discontinued operations, of cash held from a broker, futures... false false false false false false false false false 1 true true 11000000 11000 false false 2 true true 0 0 false false Carrying amount as of the balance sheet date, included in discontinued operations, of cash held from a broker, futures clearing merchant or counterparty as security for a trading, derivative or non-derivative position and/or accounts receivable. No authoritative reference available. false 6 Preferred stock par value per share 1 us-gaap_PreferredStockParOrStatedValuePerShare us-gaap true na instant decimal No definition available. false false false false false false false false true 1 true true 0.001 0.001 false false 2 true true 0.001 0.001 false false No definition available. No authoritative reference available. false 7 Preferred stock shares authorized 1 us-gaap_PreferredStockSharesAuthorized us-gaap true na instant shares No definition available. false false false false false false false false false 1 false true 125000000 125000000.00 false false 2 false true 125000000 125000000.00 false false No definition available. No authoritative reference available. false 8 Preferred stock shares outstanding 1 us-gaap_PreferredStockSharesOutstanding us-gaap true na instant shares No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 0 0 false false No definition available. No authoritative reference available. false 9 Common stock par value per share 1 us-gaap_CommonStockParOrStatedValuePerShare us-gaap true na instant decimal No definition available. false false false false false false false false true 1 true true 0.001 0.001 false false 2 true true 0.001 0.001 false false No definition available. No authoritative reference available. false 10 Common stock shares authorized 1 us-gaap_CommonStockSharesAuthorized us-gaap true na instant shares No definition available. false false false false false false false false false 1 false true 2000000000 2000000000.00 false false 2 false true 2000000000 2000000000.00 false false No definition available. No authoritative reference available. false 11 Common stock shares issued 1 us-gaap_CommonStockSharesIssued us-gaap true na instant shares No definition available. false false false false false false false false false 1 false true 352785985 352785985.00 false false 2 false true 349812537 349812537.00 false false No definition available. No authoritative reference available. false false 2 10 false Thousands NoRounding Thousands false true