Nature of Operations and Summary of Significant Accounting Policies Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 14,539	$ 12,528	$ 10,696
Property, plant and equipment, gross	200,375	162,067
Less accumulated depreciation	(63,074)	(45,909)
Property, plant and equipment, net	137,301	116,158
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	96,984	72,783
Property, plant and equipment, estimated useful life, minimum	20
Property, plant and equipment, estimated useful life, maximum	35
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	79,173	69,572
Property, plant and equipment, estimated useful life, minimum	3
Property, plant and equipment, estimated useful life, maximum	12
Computer equipment, furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,043	10,912
Property, plant and equipment, estimated useful life, minimum	3
Property, plant and equipment, estimated useful life, maximum	7
Construction in Process [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 8,175	$ 8,800