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Goodwill and Intangible Assets - Summary of Change in Goodwill and Intangible Assets (Details) - QL Holdings LLC and Subsidiaries - USD ($) $ in Thousands	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]
Goodwill, Beginning balance			$ 18,402	$ 18,402	$ 18,402
Goodwill, Ending balance	$ 18,402		18,402		18,402
Intangible assets, Beginning balance			18,752	23,985	23,985
Additions to intangible assets					148
Intangible assets, Amortization	(800)	$ (1,400)	(2,402)	$ (4,158)	(5,381)
Intangible assets, Ending balance	$ 16,350		$ 16,350		$ 18,752

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Goodwill and intangible assets.

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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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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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