Inventories (Narrative) (Details) (USD $)			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 VAC [Member]	Aug. 02, 2011 VAC [Member]
Inventories [Line Items]
Inventories	$ 615,018,000	$ 293,625,000		$ 194,700,000
Inventory fair value				362,800,000
Amount of step-up of inventory to fair value				168,100,000
Estimated fair value step-up recognized			92,100,000
Charges recognized on inventory to reduce carrying value to market			14,500,000
Remaining inventory step-up recognized as inventory on-hand			$ 56,400,000