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Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |  |  |
Interest rate cap/swap agreements |  | $ 175 |  | $ 184 |
Interest rate cap/swap agreements | $ (154) |  | $ (6,480) |  |
Level 2 measurement | Cap |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Notional Amount | $ 300,000 |  | $ 300,000 |  |
LIBOR Rate | 4.00% |  | 4.00% |  |
Fair Value | $ 0 |  | $ 0 |  | $ (53)
Level 2 measurement | Swaps |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Notional Amount | $ 400,000 |  | $ 400,000 |  |
LIBOR Rate | 2.85% |  | 2.85% |  |
Fair Value | $ (10,946) |  | $ (10,946) |  | $ (4,413)

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