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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.

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