Income Taxes - Reconciliation of Tax Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Balance at beginning of period	$ 13,162	$ 15,990	$ 11,401
Additions based on tax positions taken during a prior period	484	94	1,258
Additions based on tax positions taken during the current period			4,433
Reductions based on tax positions taken during a prior period	(4,295)	(153)
Reductions related to a lapse of applicable statute of limitations	(821)	(3,144)	(1,102)
Reductions related to a settlement with taxing authorities		(382)
Balance at end of period	13,009	13,162	$ 15,990
Acquisitions [Member]
Income Tax Contingency [Line Items]
Additions based on tax positions taken during a prior period	$ 4,479	$ 757