Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment		$ 203,386	$ 164,815
Less: Accumulated depreciation and amortization		(105,865)	(84,837)
Total property and equipment, net		97,521	79,978
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		903	903
Building [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		11,276	11,122
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		134,666	108,826
Capitalized Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		8,834	8,651
Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		4,677	3,130
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		$ 29,503	24,423
Useful Life (in years)	[1]	Life of lease (a)
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment		$ 13,527	$ 7,760
Minimum [Member] | Building [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		25 years
Minimum [Member] | Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		2 years
Minimum [Member] | Capitalized Software [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		3 years
Minimum [Member] | Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		1 year
Maximum [Member] | Building [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		30 years
Maximum [Member] | Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		7 years
Maximum [Member] | Capitalized Software [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		5 years
Maximum [Member] | Office Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life (in years)		5 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.