Intangible Assets (Intangible Assets Other Than Goodwill) (Details) (USD $) | 6 Months Ended | |
In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013 |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Accumulated Amortization | ($87,119) | ($69,554) |
Intangible assets, Gross | 264,902 | 211,263 |
Intangible assets, Net | 177,783 | 141,709 |
Weighted average useful life | '4 years | ' |
Trademarks [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Indefinite-lived intangible assets | 5,910 | 2,110 |
Licenses [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 5,875 | 5,875 |
Intangible assets with finite lives: Accumulated Amortization | -5,875 | -5,875 |
Patent Costs [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 22,211 | 21,545 |
Intangible assets with finite lives: Accumulated Amortization | -7,195 | -5,960 |
Intangible assets with finite lives: Net | 15,016 | 15,585 |
Weighted average useful life | '3 years | ' |
Acquired Technology [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 44,591 | 30,095 |
Intangible assets with finite lives: Accumulated Amortization | -15,410 | -13,615 |
Intangible assets with finite lives: Net | 29,181 | 16,480 |
Weighted average useful life | '5 years | ' |
Internally Developed Software [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 17,862 | 18,097 |
Intangible assets with finite lives: Accumulated Amortization | -13,583 | -12,863 |
Intangible assets with finite lives: Net | 4,279 | 5,234 |
Intangible assets, useful life | '5 years | ' |
Customer Relationships [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 113,067 | 95,793 |
Intangible assets with finite lives: Accumulated Amortization | -28,021 | -18,283 |
Intangible assets with finite lives: Net | 85,046 | 77,510 |
Weighted average useful life | '5 years | ' |
Non-Compete Agreements [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 21,010 | 16,848 |
Intangible assets with finite lives: Accumulated Amortization | -8,758 | -6,666 |
Intangible assets with finite lives: Net | 12,252 | 10,182 |
Weighted average useful life | '3 years | ' |
Trade Names [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 10,708 | 9,302 |
Intangible assets with finite lives: Accumulated Amortization | -3,459 | -2,211 |
Intangible assets with finite lives: Net | 7,249 | 7,091 |
Weighted average useful life | '3 years | ' |
Other [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets with finite lives: Gross | 23,668 | 11,598 |
Intangible assets with finite lives: Accumulated Amortization | -4,818 | -4,081 |
Intangible assets with finite lives: Net | $18,850 | $7,517 |
Weighted average useful life | '2 years | ' |
Minimum [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '1 year | ' |
Minimum [Member] | Patent Costs [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '6 years | ' |
Minimum [Member] | Acquired Technology [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '5 years | ' |
Minimum [Member] | Customer Relationships [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '5 years | ' |
Minimum [Member] | Non-Compete Agreements [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '3 years | ' |
Minimum [Member] | Trade Names [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '2 years | ' |
Minimum [Member] | Other [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '1 year | ' |
Maximum [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '13 years | ' |
Maximum [Member] | Patent Costs [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '7 years | ' |
Maximum [Member] | Acquired Technology [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '10 years | ' |
Maximum [Member] | Internally Developed Software [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Weighted average useful life | '1 year | ' |
Maximum [Member] | Customer Relationships [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '13 years | ' |
Maximum [Member] | Non-Compete Agreements [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '11 years | ' |
Maximum [Member] | Trade Names [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '10 years | ' |
Maximum [Member] | Other [Member] | ' | ' |
Finite And Indefinite Lived Intangible Assets [Line Items] | ' | ' |
Intangible assets, useful life | '7 years | ' |