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Debt Obligations - Consolidated Debt Obligations Outstanding (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Consolidated debt obligations |  |
Plus: original issue premium (discount), net | $ (9,163) |
Less: deferred financing costs | (7,182) |
Outstanding indebtedness | 1,888,591 |
Unsecured Debt |  |
Consolidated debt obligations |  |
Principal balance outstanding | 1,886,610 | $ 1,828,610
Plus: original issue premium (discount), net | 9,163 | 10,137
Less: deferred financing costs | (7,182) | (8,152)
Outstanding indebtedness | 1,888,591 | 1,830,595
Unsecured Debt | $600 million Unsecured Credit Facility |  |
Consolidated debt obligations |  |
Debt instrument, face amount | 600,000 |
Principal balance outstanding | $ 58,000 | 0
Unsecured Debt | $600 million Unsecured Credit Facility | LIBOR |  |
Consolidated debt obligations |  |
Spread on variable rate | 1.10% |
Unsecured Debt | Seven-Year Term Loan - Swapped to fixed |  |
Consolidated debt obligations |  |
Debt instrument, term | 7 years |
Principal balance outstanding | $ 250,000 | 250,000
Effective interest rate | 2.87% |
Unsecured Debt | $350.0M 3.95% Guaranteed Notes due 2023 |  |
Consolidated debt obligations |  |
Debt instrument, face amount | $ 350,000 |
Debt instrument, interest rate, stated percentage | 3.95% |
Principal balance outstanding | $ 350,000 | 350,000
Effective interest rate | 3.87% |
Unsecured Debt | $350.0M 4.10% Guaranteed Notes due 2024 |  |
Consolidated debt obligations |  |
Debt instrument, face amount | $ 350,000 |
Debt instrument, interest rate, stated percentage | 4.10% |
Principal balance outstanding | $ 350,000 | 350,000
Effective interest rate | 3.78% |
Unsecured Debt | $450.0M 3.95% Guaranteed Notes due 2027 |  |
Consolidated debt obligations |  |
Debt instrument, face amount | $ 450,000 |
Debt instrument, interest rate, stated percentage | 3.95% |
Principal balance outstanding | $ 450,000 | 450,000
Effective interest rate | 4.03% |
Unsecured Debt | $350.0M 4.55% Guaranteed Notes due 2029 |  |
Consolidated debt obligations |  |
Debt instrument, face amount | $ 350,000 |
Debt instrument, interest rate, stated percentage | 4.55% |
Principal balance outstanding | $ 350,000 | 350,000
Effective interest rate | 4.30% |
Unsecured Debt | Indenture IA (Preferred Trust I) |  |
Consolidated debt obligations |  |
Principal balance outstanding | $ 27,062 | 27,062
Unsecured Debt | Indenture IA (Preferred Trust I) | LIBOR |  |
Consolidated debt obligations |  |
Spread on variable rate | 1.25% |
Unsecured Debt | Indenture IB (Preferred Trust I) |  |
Consolidated debt obligations |  |
Principal balance outstanding | $ 25,774 | 25,774
Unsecured Debt | Indenture IB (Preferred Trust I) | LIBOR |  |
Consolidated debt obligations |  |
Spread on variable rate | 1.25% |
Unsecured Debt | Indenture II (Preferred Trust II) |  |
Consolidated debt obligations |  |
Principal balance outstanding | $ 25,774 | $ 25,774
Unsecured Debt | Indenture II (Preferred Trust II) | LIBOR |  |
Consolidated debt obligations |  |
Spread on variable rate | 1.25% |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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