Revenue - ASC 606 - Cumulative effect and consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Accounts receivable, net	$ 100,071	$ 86,011	$ 79,881
Inventories	1,495,041	1,410,773	1,415,915
Prepaid expenses and other assets	36,637	37,229	32,721
Deferred tax assets, net	145,751	155,248	155,551
Liabilities
Accrued liabilities	143,792	102,950	101,929
Deferred revenues and gains, current	92,391	78,526	77,669
Deferred revenues and gains, non-current	69,223	63,590	64,061
Stockholders' equity:
Retained earnings	35,730	7,502	6,192
Non-controlling interests	52,276	36,808	$ 34,332
Balances Without Adoption of ASC 606
Assets
Accounts receivable, net	93,456
Inventories	1,501,772
Prepaid expenses and other assets	29,623
Deferred tax assets, net	146,054
Liabilities
Accrued liabilities	142,640
Deferred revenues and gains, current	91,440
Deferred revenues and gains, non-current	69,880
Stockholders' equity:
Retained earnings	33,945
Non-controlling interests	48,912
Effect of Change Higher/(Lower)
Assets
Accounts receivable, net	6,615	6,130
Inventories	(6,731)	(5,142)
Prepaid expenses and other assets	7,014	4,508
Deferred tax assets, net	(303)	(303)
Liabilities
Accrued liabilities	1,152	1,021
Deferred revenues and gains, current	951	857
Deferred revenues and gains, non-current	(657)	(471)
Stockholders' equity:
Retained earnings	1,785	1,310
Non-controlling interests	$ 3,364	$ 2,476