Income Taxes - Summary of Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of year	$ 52,159	$ 131,608	$ 152,581
Increases resulting from tax positions taken during a prior period	12,333	4,121	7,482
Decreases resulting from tax positions taken during a prior period	(851)	0	(7,025)
Increases resulting from tax positions taken during the current period	4,572	3,169	1,656
Decreases related to settlements with taxing authorities	(8,670)	(601)	(3,594)
Reductions related to the lapse of statute of limitations	(6,034)	(86,138)	(19,492)
Unrecognized tax benefits at end of year	$ 53,509	$ 52,159	$ 131,608

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount of unrecognized tax benefits.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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