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Deferred Credits (Details) (USD $)
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12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Amortization of below market tenant leases | $ 29,600,000 | $ 20,800,000 | |||||||
| Off-market Lease, Unfavorable | 145,500,000 | 17,000,000 | |||||||
| Weighted Average Remaining Term Of Tenant Leases | 11 years | ||||||||
| Deferred Credit Amortization Expense, Year One | 21,854,000 | ||||||||
| Deferred Credit Amortization Expense, Year Two | 21,839,000 | ||||||||
| Deferred Credit Amortization Expense, Year Three | 21,796,000 | ||||||||
| Deferred Credit Amortization Expense, Year Four | 21,767,000 | ||||||||
| Deferred Credit Amortization Expense, Year Five | 21,741,000 | ||||||||
| Deferred credits and other liabilities | 1,349,919,000 | 910,571,000 | |||||||
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deferred ground lease payable [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Deferred credits and other liabilities | 357,419,000 | 312,262,000 | |||||||
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customer prepaid rent [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Deferred credits and other liabilities | 350,474,000 | 173,420,000 | |||||||
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Above Market Leases [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Amortization of above and below Market Leases | 7,200,000 | 3,400,000 | 3,800,000 | ||||||
| Deferred credits and other liabilities | 276,319,000 | [1] | 58,195,000 | [1] | |||||
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deferred credits [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Deferred credits and other liabilities | 244,537,000 | [2] | 271,123,000 | [2] | |||||
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asset retirement obligations [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Deferred credits and other liabilities | 118,403,000 | 94,953,000 | |||||||
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Other Liabilities [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Deferred credits and other liabilities | 2,767,000 | 618,000 | |||||||
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Amortization expense, 2014 [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Expected amortization of below-market tenant leases by year | 28,670,000 | ||||||||
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Amortization expense, 2017 [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Expected amortization of below-market tenant leases by year | 24,243,000 | ||||||||
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Amortization expense, 2016 [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Expected amortization of below-market tenant leases by year | 27,021,000 | ||||||||
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Amortization expense, 2015 [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Expected amortization of below-market tenant leases by year | 27,395,000 | ||||||||
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Amortization expense, 2018 [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Expected amortization of below-market tenant leases by year | 21,428,000 | ||||||||
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Gross Value [Member]
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| Deferred Revenue Arrangement [Line Items] | |||||||||
| Below market tenant leases | $ 291,900,000 | ||||||||
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