Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated other comprehensive income (loss)	Treasury stock	Parent	Noncontrolling interest
Stock Issued During Period, Value, Treasury Stock Reissued						$ 0
Stock Issued During Period, Shares, Treasury Stock Reissued						0
Beginning balance at Dec. 31, 2012			$ 356,895	$ (247,096)	$ 0	$ (78,839)		$ 0
Beginning balance (in shares) at Dec. 31, 2012		26,481				3,030
Increase (Decrease) in Stockholders' Equity
Net income attributable to stockholders of Overstock.com, Inc.	$ 84,378			84,378
Stock-based compensation to employees and directors			3,251
Common stock issued upon vesting of restricted stock		339
Exercise of stock options			1,560
Exercise of stock options (in shares)		89
Net other comprehensive loss	0				0
Purchase of treasury stock						$ (1,391)
Purchase of treasury stock (in shares)						94
Net loss attributable to noncontrolling interests	0							0
Paid-in capital attributable to noncontrolling interests								0
Deficiency in cost of treasury stock issued				0
Ending balance at Dec. 31, 2013	$ 118,760		361,706	(162,718)	0	$ (80,230)	$ 118,760	0
Ending balance (in shares) at Dec. 31, 2013	23,785	26,909				3,124
Common stock		$ 2
Stock Issued During Period, Value, Treasury Stock Reissued						$ 0
Stock Issued During Period, Shares, Treasury Stock Reissued						0
Increase (Decrease) in Stockholders' Equity
Net income attributable to stockholders of Overstock.com, Inc.	$ 8,854			8,854
Stock-based compensation to employees and directors			4,035
Common stock issued upon vesting of restricted stock		302
Exercise of stock options			511
Exercise of stock options (in shares)		30
Net other comprehensive loss	(621)				(621)
Purchase of treasury stock						$ (2,301)
Purchase of treasury stock (in shares)						80
Net loss attributable to noncontrolling interests	(53)							(53)
Paid-in capital attributable to noncontrolling interests								35
Deficiency in cost of treasury stock issued				0
Ending balance at Dec. 31, 2014	$ 129,220		366,252	(153,864)	(621)	$ (82,531)	129,238	(18)
Ending balance (in shares) at Dec. 31, 2014	24,037	27,241				3,204
Common stock	$ 2	$ 2
Stock Issued During Period, Value, Treasury Stock Reissued						$ 33,151
Stock Issued During Period, Shares, Treasury Stock Reissued						(908)
Increase (Decrease) in Stockholders' Equity
Net income attributable to stockholders of Overstock.com, Inc.	2,446			2,446
Stock-based compensation to employees and directors			3,526
Common stock issued upon vesting of restricted stock		377
Exercise of stock options			269
Exercise of stock options (in shares)		16
Net other comprehensive loss	(809)				(809)
Purchase of treasury stock						$ (2,367)
Purchase of treasury stock (in shares)						104
Net loss attributable to noncontrolling interests	(1,226)							(1,226)
Paid-in capital attributable to noncontrolling interests								152
Deficiency in cost of treasury stock issued				(15,002)
Ending balance at Dec. 31, 2015	$ 149,361		$ 370,047	$ (166,420)	$ (1,430)	$ (51,747)	$ 150,453	$ (1,092)
Ending balance (in shares) at Dec. 31, 2015	25,234	27,634				2,400
Common stock	$ 3	$ 3