Goodwill and Intangible Assets - Additional Information (Details) - QL Holdings LLC and Subsidiaries - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Goodwill And Intangible Assets [Line Items]
Amortization expense related to intangible assets	$ 800,000	$ 1,400,000	$ 2,402,000	$ 4,158,000	$ 5,381,000
Accumulated impairment of goodwill	$ 0		$ 0

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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