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Debt Obligations, net (Future Scheduled Maturities) (Details) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 USD ($) tranche | May 02, 2017 USD ($) | Dec. 31, 2016 USD ($)
Maturities of Long-term Debt [Abstract] |  |  |
2017 (remaining nine months) | $ 825,000 |  |
2018 | 610,648 |  |
2019 | 798,770 |  |
2020 | 500,000 |  |
2021 | 394,072 |  |
Thereafter | 791,045 |  |
Total principal maturities | 3,919,535 |  | $ 3,418,357
Unamortized discounts and deferred financing costs, net | (37,140) |  | (28,449)
Total debt obligations, net | 3,882,395 |  | $ 3,389,908
Unsecured Debt |  |  |
Maturities of Long-term Debt [Abstract] |  |  |
2017 (remaining nine months) | 825,000 |  |
2018 | 600,000 |  |
2019 | 770,000 |  |
2020 | 0 |  |
2021 | 275,000 |  |
Thereafter | 475,000 |  |
Total principal maturities | 2,945,000 |  |
Unamortized discounts and deferred financing costs, net | (21,148) |  |
Total debt obligations, net | $ 2,923,852 |  |
Number of tranches | tranche | 2 |  |
Secured Debt |  |  |
Maturities of Long-term Debt [Abstract] |  |  |
2017 (remaining nine months) | $ 0 |  |
2018 | 10,648 |  |
2019 | 28,770 |  |
2020 | 500,000 |  |
2021 | 119,072 |  |
Thereafter | 316,045 |  |
Total principal maturities | 974,535 |  |
Unamortized discounts and deferred financing costs, net | (15,992) |  |
Total debt obligations, net | 958,543 |  |
Other Debt Obligations |  |  |
Maturities of Long-term Debt [Abstract] |  |  |
2018 | $ 310,600 |  |
Subsequent Event |  |  |
Maturities of Long-term Debt [Abstract] |  |  |
Remaining borrowing capacity |  | $ 1,168,000 |

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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