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Acquisition (Narratives) (Details) - Secure [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Dec. 31, 2015 | Jun. 30, 2016
Business Combinations [Line Items] |  |
Acquisition Date | Nov. 12, 2015 |
Name of acquired entity |  | Secure Communication Systems, Inc. and its subsidiaries (collectively referred to as Secure Technology or Secure)
Purchase price paid | $ 230,504 |
Goodwill |  | $ 154,065

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