Long-term Debt (Notes)	Jun. 30, 2021
Debt Disclosure [Abstract]
Long-term Debt	Long-Term Debt On October 14, 2020, the Company entered into a credit agreement with JPMorgan Chase Bank, N.A to provide senior secured credit facilities in an aggregate principal amount of $800.0 million (the "JPM Credit Agreement"), which consisted of (i) a term loan facility in the principal amount of $400.0 million maturing in 2027 (the “Existing Term Loan B”) and (ii) a revolving credit facility with commitments in an aggregate principal amount of $400.0 million maturing in 2025 (the “Revolving Facility”). The Existing Term Loan B accrued interest at LIBOR plus 400 basis points (“bps”) with a LIBOR floor of 75 bps. Borrowings under the Revolving Facility accrue interest at LIBOR plus 200 bps to LIBOR plus 300 bps based on the total net leverage ratio. On May 7, 2021, the Company entered into Amendment No. 1 to the JPM Credit Agreement, under which (a) the financial covenant requiring the Company to maintain a Total First Lien Net Leverage Ratio (as defined in the JPM Credit Agreement) at or below 5.00 to 1.00 was amended to increase such level to 6.00 to 1.00, and (b) the financial covenant requiring the Company to maintain a Debt Service Coverage Ratio (as defined in the JPM Credit Agreement) at or above 2.25 to 1.00 was removed. On June 2, 2021, the Company entered into Amendment No. 2 to the JPM Credit Agreement to provide for a new senior secured first lien term loan facility in an aggregate principal amount of $500.0 million maturing in 2027 (the “New Term Loan B”). The Company used a portion of the proceeds from the New Term Loan B to repay in full the Company’s obligations under the Existing Term Loan B. The remaining terms of the New Term Loan B and the terms of the Revolving Facility remained relatively unchanged. The New Term Loan B bears interest at LIBOR plus 350 bps, subject to a LIBOR floor of 50 bps. The applicable interest rate on the Term Loan B at September 30, 2021 was 4.00%. On August 6, 2021, the Company entered into Amendment No. 3 to the JPM Credit Agreement, under which the aggregate principal amount of the Revolving Facility was increased from $400.0 million to $475.0 million. The other terms of the Revolving Facility and the terms of the New Term Loan B remained unchanged. The outstanding borrowings on the Revolving Facility of $120.0 million had an applicable interest rate of 2.33% at September 30, 2021. The Revolving Facility is also subject to a commitment fee of 0.30% on the unused capacity of $355.0 million at September 30, 2021. The JPM Credit Agreement requires the Company to meet certain financial covenants and comply with customary affirmative and negative covenants as listed in the underlying agreement. The Company was in compliance with these covenants at September 30, 2021. Interest Rate Caps The Company entered into interest rate caps to mitigate its exposure to interest rate risk by limiting the impact of interest rate changes on cash flows. In March 2021, the Company executed three interest rate cap agreements, each with a notional amount of $300.0 million, which limit our interest rates by 0.75%, 1.50%, and 2.50%, expiring on March 10, 2022, March 10, 2024 and March 8, 2026, respectively. In August 2021, the Company executed two additional interest rate cap agreements, each with a notional amount of $100.0 million and interest rate cap of 3.00%, expiring on August 13, 2028. The interest rate caps are recorded at an aggregate fair value of $5.3 million at September 30, 2021 and are included as a component of other assets on the condensed consolidated balance sheets. The Company recorded a fair value loss of $334,000 and $1.2 million related to the interest rate caps for the three and nine months ended September 30, 2021, respectively, which is included as a component of other expense, net in the condensed consolidated statements of comprehensive loss.

On October 14, 2020, the Company entered into a credit agreement with JPMorgan Chase Bank, N.A to provide senior secured credit facilities in an aggregate principal amount of $800.0 million (the "JPM Credit Agreement"), which consisted of (i) a term loan facility in the principal amount of $400.0 million maturing in 2027 (the “Existing Term Loan B”) and (ii) a revolving credit facility with commitments in an aggregate principal amount of $400.0 million maturing in 2025 (the “Revolving Facility”).

The Existing Term Loan B accrued interest at LIBOR plus 400 basis points (“bps”) with a LIBOR floor of 75 bps. Borrowings under the Revolving Facility accrue interest at LIBOR plus 200 bps to LIBOR plus 300 bps based on the total net leverage ratio.

On May 7, 2021, the Company entered into Amendment No. 1 to the JPM Credit Agreement, under which (a) the financial covenant requiring the Company to maintain a Total First Lien Net Leverage Ratio (as defined in the JPM Credit Agreement) at or below 5.00 to 1.00 was amended to increase such level to 6.00 to 1.00, and (b) the financial covenant requiring the Company to maintain a Debt Service Coverage Ratio (as defined in the JPM Credit Agreement) at or above 2.25 to 1.00 was removed.

On June 2, 2021, the Company entered into Amendment No. 2 to the JPM Credit Agreement to provide for a new senior secured first lien term loan facility in an aggregate principal amount of $500.0 million maturing in 2027 (the “New Term Loan B”). The Company used a portion of the proceeds from the New Term Loan B to repay in full the Company’s obligations under the Existing Term Loan B. The remaining terms of the New Term Loan B and the terms of the Revolving Facility remained relatively unchanged.

On August 6, 2021, the Company entered into Amendment No. 3 to the JPM Credit Agreement, under which the aggregate principal amount of the Revolving Facility was increased from $400.0 million to $475.0 million. The other terms of the Revolving Facility and the terms of the New Term Loan B remained unchanged.

The outstanding borrowings on the Revolving Facility of $120.0 million had an applicable interest rate of 2.33% at September 30, 2021. The Revolving Facility is also subject to a commitment fee of 0.30% on the unused capacity of $355.0 million at September 30, 2021.

The JPM Credit Agreement requires the Company to meet certain financial covenants and comply with customary affirmative and negative covenants as listed in the underlying agreement. The Company was in compliance with these covenants at September 30, 2021.

The Company entered into interest rate caps to mitigate its exposure to interest rate risk by limiting the impact of interest rate changes on cash flows. In March 2021, the Company executed three interest rate cap agreements, each with a notional amount of $300.0 million, which limit our interest rates by 0.75%, 1.50%, and 2.50%, expiring on March 10, 2022, March 10, 2024 and March 8, 2026, respectively. In August 2021, the Company executed two additional interest rate cap agreements, each with a notional amount of $100.0 million and interest rate cap of 3.00%, expiring on August 13, 2028. The interest rate caps are recorded at an aggregate fair value of $5.3 million at September 30, 2021 and are included as a component of other assets on the condensed consolidated balance sheets. The Company recorded a fair value loss of $334,000 and $1.2 million related to the interest rate caps for the three and nine months ended September 30, 2021, respectively, which is included as a component of other expense, net in the condensed consolidated statements of comprehensive loss.