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Goodwill and Other Intangible Assets (Schedule of Goodwill and Other Intangible Assets Included in Equity Method Investments) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Other intangible assets |  |  |
Gross amount | $ 148,395 | $ 58,399 |
Accumulated impairment losses and amortization | (65,495) | (43,424) |
Intangible Assets, Net, Excluding Goodwill [Roll Forward] |  |  |
Other intangible assets, Net, Beginning of Period | 14,975 |  |
Other intangible assets, Net, End of Period | 82,900 | 14,975 |
Intangible Assets, Net, Including Goodwill [Roll Forward] |  |  |
Goodwill and Other intangible assets, Net, Beginning of Period | 7,902 |  |
Goodwill and Other intangible assets, Net, End of Period | 265,154 | 7,902 |
Investments in other ventures |  |  |
Goodwill |  |  |
Goodwill, Gross amount | 12,318 | 12,318 | $ 12,545
Accumulated impairment losses and amortization | (4,500) | 0 | 0
Goodwill [Roll Forward] |  |  |
Goodwill, Net, Beginning of Period | 12,318 | 12,545 |
Adjustments to gross amount |  | (227) |
Acquired during the year | 0 |  |
Impairment losses | (4,500) |  |
Goodwill, Net, End of Period | 7,818 | 12,318 |
Other intangible assets |  |  |
Gross amount | 51,796 | 45,400 | 45,478
Accumulated impairment losses and amortization | (36,460) | (32,466) | (28,811)
Intangible Assets, Net, Excluding Goodwill [Roll Forward] |  |  |
Other intangible assets, Net, Beginning of Period | 12,934 | 16,667 |
Adjustments to gross amount |  | (78) |
Acquired during the year | 6,396 |  |
Amortization | (2,900) | (3,655) |
Impairment losses | (1,094) |  |
Other intangible assets, Net, End of Period | 15,336 | 12,934 |
Goodwill and Other intangible assets, Total |  |  |
Gross amount, Beginning of Period | 64,114 | 57,718 | 58,023
Accumulated impairment losses and amortization, Beginning of Period | (40,960) | (32,466) | $ (28,811)
Intangible Assets, Net, Including Goodwill [Roll Forward] |  |  |
Goodwill and Other intangible assets, Net, Beginning of Period | 25,252 | 29,212 |
Adjustments to gross amounts |  | (305) |
Acquired during the year | 6,396 |  |
Amortization | (2,900) | (3,655) |
Impairment losses | (5,594) |  |
Goodwill and Other intangible assets, Net, End of Period | $ 23,154 | $ 25,252 |

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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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