Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Fair Value of Financial Instruments [Abstract]
Fair Value of Debt, Greater than Aggregate Carrying Value	$ 131.8

Fair Value of Debt, Greater than Aggregate Carrying Value

No definition available.

Name:	lry_FairValueOfDebtGreaterThanAggregateCarryingValue
Namespace Prefix:	lry_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant