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Segment Information - Reconciliation of Consolidated Net Income to Consolidated NOI (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Segment Reporting [Abstract] |  |
Net income | $ 44,705 | $ 21,271
Plus: |  |
Interest expense | 19,533 | 21,437
Interest expense - amortization of deferred financing costs | 627 | 634
Depreciation and amortization | 43,291 | 45,892
General and administrative expenses | 8,723 | 9,325
Equity in loss of Real Estate Ventures | 825 | 748
Provision for impairment | 0 | 2,730
Less: |  |
Interest income | 703 | 393
Income tax provision | (138) | (100)
Net gain on disposition of real estate | 0 | 7,323
Net gain on sale of undepreciated real estate | 22 | 0
Net gain on Real Estate Venture transactions | 37,263 | 14,582
Consolidated net operating income | $ 79,854 | $ 79,839

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