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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Marketable Securities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Net realized gain on sale of available-for-sale securities	$ 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet	$ 0us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet	$ (224)us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet
Fair Value	20,512us-gaap_AvailableForSaleSecurities	13,973us-gaap_AvailableForSaleSecurities
Common Stocks [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	4,195us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember	4,195us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	16,321us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember	9,778us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember
Gross Unrealized Losses	0cbl_AvailableforsaleSecuritiesGrossUnrealizedLoss1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember	0cbl_AvailableforsaleSecuritiesGrossUnrealizedLoss1 / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember
Fair Value	$ 20,516us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember	$ 13,973us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_CommonStockMember

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Available-for-sale Securities, Gross Unrealized Loss(1)

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

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-Publisher FASB

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 210

-SubTopic 10

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This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Topic 320

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-Section 50

-Paragraph 9

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