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Derivative Instruments and Hedging Activities	9 Months Ended
Derivative Instruments and Hedging Activities	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Prior to the refinancing transactions described in Note 6, the Company used interest-rate-related derivative instruments to manage its exposure related to changes in interest rates on its variable-rate debt instruments. The Company does not enter into derivative instruments for any purpose other than cash flow hedging. The Company does not speculate using derivative instruments. In order to manage the market risk arising from the previously outstanding term loans, the Company entered into a series of interest rate caps. As of September 30, 2019 and December 31, 2018, the Company had no interest rate cap agreements outstanding. In connection with the issuance of the Class A-2 Notes, the Company terminated the interest rate caps it had entered into in order to hedge interest expense on its previously outstanding term loans.