Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	9 Months Ended
	Aug. 06, 2010	Oct. 30, 2010
Summary of fair values of identifiable assets acquired and liabilities assumed as of the acquisition date
Current non-cash assets	$ 25,515
Inventory	65,320
Property and equipment	5,657
Intangible assets	36,975
Total identifiable assets acquired	133,467
Current liabilities	40,869
Other liabilities	8,273
Total liabilities assumed	49,142
Net identifiable assets acquired	84,325
Goodwill	26,989
Subtotal	111,314
Less: Fair value of noncontrolling interest	(13,004)
Gain on bargain purchase acquisition	(524)	(524)
Net assets acquired	97,786
Dimensions [Member]
Summary of fair values of identifiable assets acquired and liabilities assumed as of the acquisition date
Current non-cash assets	25,515
Inventory	48,340
Property and equipment	5,374
Intangible assets	35,474
Total identifiable assets acquired	114,703
Current liabilities	40,590
Other liabilities	8,273
Total liabilities assumed	48,863
Net identifiable assets acquired	65,840
Goodwill	26,989
Subtotal	92,829
Less: Fair value of noncontrolling interest	(13,004)
Gain on bargain purchase acquisition	0
Net assets acquired	79,825
Alexandra [Member]
Summary of fair values of identifiable assets acquired and liabilities assumed as of the acquisition date
Current non-cash assets	0
Inventory	16,980
Property and equipment	283
Intangible assets	1,501
Total identifiable assets acquired	18,764
Current liabilities	279
Other liabilities	0
Total liabilities assumed	279
Net identifiable assets acquired	18,485
Goodwill	0
Subtotal	18,485
Less: Fair value of noncontrolling interest	0
Gain on bargain purchase acquisition	(524)
Net assets acquired	$ 17,961