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Income Taxes - Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Deferred tax assets (liabilities), net	$ (19,000)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 106,000us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred tax liability written off	0lxp_DeferredTaxAssetsWrittenOff	(150,000)lxp_DeferredTaxAssetsWrittenOff	0lxp_DeferredTaxAssetsWrittenOff
Permanent differences	0lxp_EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	1,936,000lxp_EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount	37,000lxp_EffectiveIncomeTaxRateReconciliationPermanentDifferencesAmount
Operating loss carryforwards	0us-gaap_OperatingLossCarryforwards	0us-gaap_OperatingLossCarryforwards
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
State taxes paid	$ 1,183,000lxp_StateTaxesPaid / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember	$ 1,280,000lxp_StateTaxesPaid / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember	$ 968,000lxp_StateTaxesPaid / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember

X

- Definition

Deferred Tax Assets, Written Off

+ References

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- Definition

Effective Income Tax Rate Reconciliation, Permanent Differences, Amount

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- Definition

State Taxes Paid

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- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

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