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Lease Intangibles - Schedule of Intangible Assets and Liabilities Included in Other Assets and Other Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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Finite-Lived Intangible Assets [Line Items] |  |
Amortizable Intangible Assets, Gross Carrying Amount | $ 262,339 | $ 234,190
Amortizable Intangible Assets, Accumulated Amortization | (141,168) | (118,251)
Amortizable Intangible Assets, Net Carrying Amount | 121,171 | 115,939
Amortizable Intangible Liabilities |  |
Amortizable Intangible Liabilities, Gross Carrying Amount | (159,814) | (152,188)
Amortizable Intangible Liabilities, Accumulated Amortization | 70,516 | 57,721
Amortizable Intangible Liabilities, Net Carrying Amount | (89,298) | (94,467)
Above-market Ground Lease, Gross | (671) | (671)
Above-market Ground Lease, Accumulated Amortization | 137 | 93
Above-market Ground Lease, Net | (534) | (578)
Finite-Lived Intangible Liabilities, Gross | (160,485) | (152,859)
Finite-Lived Intangible Liabilities, Accumulated Amortization | 70,653 | 57,814
Finite-Lived Intangible Liabilities, Net | (89,832) | (95,045)
In-place lease intangible assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable Intangible Assets, Gross Carrying Amount | 245,221 | 216,021
Amortizable Intangible Assets, Accumulated Amortization | (128,237) | (105,972)
Amortizable Intangible Assets, Net Carrying Amount | 116,984 | 110,049
Amortizable Intangible Liabilities |  |
Amortizable Intangible Liabilities, Net Carrying Amount | (85,111) |
Above-market rent |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable Intangible Assets, Gross Carrying Amount | 17,118 | 18,169
Amortizable Intangible Assets, Accumulated Amortization | (12,931) | (12,279)
Amortizable Intangible Assets, Net Carrying Amount | $ 4,187 | $ 5,890

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