Future Minimum Base Rents and Lease Payments Future Minimum Rents - Schedule of Future Minimum Rental Payments for Operating Leases (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Operating Leased Assets
2015 (nine months ending December 31, 2015)	$ 127,062
2016	167,764
2017	156,384
2018	147,906
2019	134,859
2020	108,628
Thereafter	468,888
Total	1,311,491
Non-Cancelable Leases
Operating Leased Assets
2015 (nine months ending December 31, 2015)	126,383
2016	164,528
2017	149,492
2018	138,278
2019	124,110
2020	101,106
Thereafter	468,888
Total	1,272,785
Subject to Early Termination Options
Operating Leased Assets
2015 (nine months ending December 31, 2015)	679
2016	3,236
2017	6,892
2018	9,628
2019	10,749
2020	7,522
Thereafter	0
Total	$ 38,706

Operating Leases, Future Minimum Payments Receivable, after Six Years

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- Definition

Operating Leases, Future Minimum Payments Receivable, in Six Years

+ References

No definition available.

+ Details

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- Definition

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

+ References

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

+ Details

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- Definition

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

+ References

+ Details

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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

+ Details

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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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