Detail of Certain Balance Sheet Accounts - Current and Long-Term Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance at beginning of year	$ 5,839	$ 4,465
Charges to bad debt expense	11,249	7,169	$ 87
Direct write-offs charged against the allowance	(7,690)	(5,795)
Balance at end of year	$ 9,398	$ 5,839	$ 4,465