Property, Plant And Equipment (Property, Plant And Equipment, Presented Net Of Accumulated Depreciation) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Total gross book value	$ 260,742	$ 262,679
Less-Accumulated depreciation	(80,333)	(69,221)
Less-Accumulated depreciation of leases	(931)	(595)
Total	179,478	192,863
Land And Buildings [Member]
Property, Plant and Equipment [Line Items]
Total gross book value	102,615	109,660
Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Total gross book value	113,962	119,427
Motor Vehicles [Member]
Property, Plant and Equipment [Line Items]
Total gross book value	15,671	15,884
Motor Vehicles Under Lease [Member]
Property, Plant and Equipment [Line Items]
Total gross book value	3,008	2,915
Computer Hardware And Software [Member]
Property, Plant and Equipment [Line Items]
Total gross book value	$ 25,486	$ 14,794