Property And Equipment (Schedule Of Property And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 74,776		$ 71,382
Less: Accumulated depreciation and amortization	(38,782)		(37,029)
Total property and equipment, net	35,994		34,353
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	541		541
Building [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	9,315		9,315
Property and equipment, useful life, in years	25 years
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	46,971		45,869
Capitalized Software - ERP [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	3,680		3,181
Property and equipment, useful life, in years	5 years
Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	3,525		3,357
Property and equipment, useful life, in years	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	8,922		6,467
Leasehold improvements useful life	Life of lease (1)	[1]
Rental Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment			57
Property and equipment, useful life, in years	5 years
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,822		$ 2,595
Minimum [Member] | Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life, in years	3 years
Maximum [Member] | Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life, in years	7 years

[1] Leasehold improvements are amortized on a straight-line basis over the shorter of (i) their estimated useful lives and (ii) the estimated or contractual life of the related lease