Schedule II - Valuation and Qualifying Accounts - Summary of the Deferred Tax Assets Valuation Allowance and Allowance for Doubtful Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended			21 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2019
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance at beginning of year	$ 7,242	$ 31,751	$ 27,616	$ 7,242
Additions		617	6,755	22,770
Deductions		25,126	2,620	2,147
Balance at end of year		7,242	31,751	27,865
SEC Schedule, 12-09, Allowance, Loan and Lease Loss [Member]
Balance at beginning of year	9	21	4	$ 9
Additions	1,880	14	21
Deductions	632	26	4
Balance at end of year	$ 1,257	$ 9	$ 21