Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 26, 2016
Unconsolidated VIEs
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Principal balance of finance receivable				$ 301,800
Accounts receivable – allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	$ 4,091	$ 2,741	$ 2,905
Provision charged to expense	(731)	(1,328)	101
Reserve adjustments	(137)	99	(63)
Write-offs, net of recoveries	(678)	(77)	0
Balance, end of period	4,007	4,091	2,741
Finance receivables – allowance for credit losses
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	192,471	173,343	147,178
Provision charged to expense	(106,870)	(132,444)	(136,617)
Write-offs, net of recoveries	(109,456)	(113,316)	(107,161)
Other	0	0	(3,291)
Balance, end of period	189,885	192,471	173,343
Inventories – allowance for obsolescence
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	38,669	39,873	26,740
Provision charged to expense	(25,722)	(16,940)	(21,137)
Reserve adjustments	(332)	306	(88)
Write-offs, net of recoveries	(25,044)	(18,450)	(7,916)
Balance, end of period	39,015	38,669	39,873
Deferred tax assets – valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, beginning of period	21,561	30,953	20,659
Reserve adjustments	307	(9,392)	10,294
Balance, end of period	$ 21,868	$ 21,561	$ 30,953