Rental Property Revenues (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Operating Leases, Future Minimum Payments Receivable [Abstract]
Thereafter	$ 651,690
Operating Leases, Future Minimum Payments Receivable, in Three Years	200,654
Operating Leases, Future Minimum Payments Receivable, in Two Years	218,991
Operating Leases, Future Minimum Payments Receivable, in Four Years	191,446
Operating Leases, Future Minimum Payments Receivable, in Five Years	166,739
Operating Leases, Future Minimum Payments Receivable, Current	219,974
Total Rentals	$ 1,649,494

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

+ Details

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- Definition

Future rental payments receivable within one year of the balance sheet date under an operating lease.

+ References

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Data Type:	xbrli:monetaryItemType
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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

+ References

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- Definition

Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

+ References

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- Definition

Future rental payments receivable within the third year from the balance sheet date under an operating lease.

+ References

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- Definition

Future rental payments receivable within the second year from the balance sheet date under an operating lease.

+ References

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- Definition

Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

+ References

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