Line of Credit Facility, Maximum Borrowing Capacity with Lender Approval

No definition available.

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Namespace Prefix:	lxp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percent Of Notes Required To Be Repurchased At The Option Of The Holders On Set Dates

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Conversion Rate
-URI http://asc.fasb.org/extlink&oid=6509012

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 835
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of joint and several liability recognized in the balance sheet.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 405
-SubTopic 40
-Section 50
-Paragraph 1
-Subparagraph (c)
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This is the principal amount outstanding for securitized loans only (across all types of loans).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
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-Paragraph 4
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Period Type:

- Details

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Period Type:

- Details

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- Details

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- Details

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Debt - Additional Information (Details)	3 Months Ended		6 Months Ended		12 Months Ended
Debt - Additional Information (Details)	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2015 USD ($) shares	Dec. 31, 2010 USD ($)	Dec. 31, 2007 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Percent of notes required to be repurchased at the option of the holders					100.00%
Converted instrument, amount			$ 672,000
Converted debt, shares issued (in shares) \| shares				519,664
Debt satisfaction charges, net	$ 3,194,000	$ (3,776,000)	$ 3,356,000	$ (14,151,000)
LCIF [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.70%		4.70%				4.70%
Debt satisfaction charges, net	$ 1,615,000	$ 0	$ 1,615,000	33,000
Co-borrower debt	$ 193,278,000		193,278,000				$ 201,106,000
Convertible Debt [Member]
Debt Instrument [Line Items]
Amount of debt converted			$ 500,000	$ 3,428,000
Minimum [Member] \| LCIF [Member]
Debt Instrument [Line Items]
Stated interest rate	4.00%		4.00%
Maximum [Member] \| LCIF [Member]
Debt Instrument [Line Items]
Stated interest rate	6.50%		6.50%
Mortgages and Notes Payable [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.90%		4.90%				4.90%
Mortgages and Notes Payable [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Stated interest rate	2.20%		2.20%				2.20%
Mortgages and Notes Payable [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Stated interest rate	7.80%		7.80%				7.80%
Unsecured Debt [Member] \| Unsecured Credit Agreement [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 905,000,000		$ 905,000,000
Maximum borrowing capacity with lender approval	1,810,000,000		1,810,000,000
Unsecured Debt [Member] \| Unsecured Credit Agreement [Member] \| LCIF [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	905,000,000		905,000,000
Maximum borrowing capacity with lender approval	$ 1,810,000,000		$ 1,810,000,000
6% Convertible Guaranteed Note [Member]
Debt Instrument [Line Items]
Stated interest rate	6.00%	6.00%	6.00%	6.00%			6.00%
Face amount of debt instrument	$ 11,900,000		$ 11,900,000		$ 115,000,000		$ 12,400,000
Maturity date			Jan. 31, 2030
Conversion ratio numerator			159.0145
Conversion price (dollars per share) \| $ / shares	$ 6.29		$ 6.29
Debt satisfaction charges, net			$ 32,000	$ 438,000
6% Convertible Guaranteed Note [Member] \| LCIF [Member]
Debt Instrument [Line Items]
Stated interest rate					6.00%
Face amount of debt instrument					$ 115,000,000
Percent of notes required to be repurchased at the option of the holders					100.00%
6.804% Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Stated interest rate						6.804%
Face amount of debt instrument						$ 200,000,000
Principal amount outstanding	$ 129,120,000		129,120,000				129,120,000
Unamortized debt issuance costs	$ 2,074,000		2,074,000				$ 2,124,000
6.804% Trust Preferred Securities [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate						1.70%
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Debt satisfaction charges, net			$ 3,000	$ (4,123,000)