Indebtedness (Amortization and Maturity Schedule) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
2017	$ 7,896
2018	33,572
2019	56,709
2020	420,721
2021	67,417
2022	402,172
2023	302,281
2024	452,385
2025	402,513
2026 and thereafter	424,240
Subtotal	2,569,906
Reconciling items	(12,970)
Total for consolidated balance sheet	$ 2,556,936
Weighted average interest rate	4.04%
Principal Amortization, Mortgages [Member]
Debt Instrument [Line Items]
2017	$ 7,896
2018	6,470
2019	6,666
2020	3,351
2021	2,326
2022	2,172
2023	2,281
2024	2,385
2025	2,513
2026 and thereafter	22,294
Subtotal	58,354
Reconciling items	6,744
Total for consolidated balance sheet	65,098
Principal Maturities, Mortgages [Member]
Debt Instrument [Line Items]
2017	0
2018	27,102
2019	50,043
2020	67,370
2021	65,091
2022	0
2023	0
2024	0
2025	0
2026 and thereafter	1,946
Subtotal	211,552
Reconciling items	0
Total for consolidated balance sheet	211,552
Unsecured Debt [Member]
Debt Instrument [Line Items]
2017	0
2018	0
2019	0
2020	350,000
2021	0
2022	400,000
2023	300,000
2024	450,000
2025	400,000
2026 and thereafter	400,000
Subtotal	2,300,000
Reconciling items	(19,714)
Total for consolidated balance sheet	2,280,286
Line of Credit [Member]
Debt Instrument [Line Items]
2017	0
2018	0
2019	0
2020	0
2021	0
2022	0
2023	0
2024	0
2025	0
2026 and thereafter	0
Subtotal	0
Reconciling items	0
Total for consolidated balance sheet	$ 0
Due in Next Twelve Months [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.94%
Due in Year Two [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.96%
Due in Year Three [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.03%
Due in Year Four [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.93%
Due in Year Five [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.06%
Due in Year Six [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.13%
Due in Year Seven [Member]
Debt Instrument [Line Items]
Weighted average interest rate	3.39%
Due in Year Eight [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.40%
Due in Year Nine [Member]
Debt Instrument [Line Items]
Weighted average interest rate	3.76%
Due After Year Nine [Member]
Debt Instrument [Line Items]
Weighted average interest rate	3.34%

Long-term Debt, Maturities, Repayments of Principal After Year Nine

No definition available.

Name:	lry_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearNine
Namespace Prefix:	lry_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term Debt, Maturities, Repayments of Principal in Year Eight

+ References

No definition available.

+ Details

Name:	lry_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearEight
Namespace Prefix:	lry_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term Debt, Maturities, Repayments of Principal in Year Nine

+ References

No definition available.

+ Details

Name:	lry_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearNine
Namespace Prefix:	lry_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term Debt, Maturities, Repayments of Principal in Year Seven

+ References

No definition available.

+ Details

Name:	lry_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSeven
Namespace Prefix:	lry_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term Debt, Maturities, Repayments of Principal in Year Six

+ References

No definition available.

+ Details

Name:	lry_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix
Namespace Prefix:	lry_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The total amount of scheduled principal amortization and maturies of a company's long-term debt including mortgage loans, unsecured notes and line of credit.

+ References

No definition available.

+ Details

Name:	lry_LongtermDebtMaturitiesTotal
Namespace Prefix:	lry_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

+ Details

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

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

+ Details

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

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04.(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

+ Details

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

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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

- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=lry_PrincipalAmortizationMortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=lry_PrincipalMaturitiesMortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInNextTwelveMonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueInYearNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lry_DueAfterYearNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: