| **Intangible Assets and Goodwill (Tables)**                             | 3 Months Ended                                                                                                                                                                                                                   |
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| **Goodwill and Intangible Assets Disclosure [Abstract]**                |                                                                                                                                                                                                                             |
| Schedule Of Amortization Expense                                        | Amortization expense for amortizable intangible assets was as follows (amounts in thousands): Three Months Ended  March 31, 2016 2015Amortization expense$2,760 2,686                              |
| Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | Amortization expense for amortizable intangible assets for each of the five succeeding fiscal years is estimated to be (amounts in thousands):Years Ending December 31, 2016$10,9382017$8,7822018$6,8142019$5,0642020$3,998 |

| X                                                                                                                                                                                                                                                                                                                                                                                                     |
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| - Definition
Tabular disclosure of amortization expense of assets, excluding financial assets, that lack physical substance, having a limited useful life.
+ References
No definition available.
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| - References
No definition available.
+ Details**Name:**us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
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| - Definition
Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275
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