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v3.3.1.900

Investments Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Schedule of Investments [Line Items] |  |  |
Available-for-sale securities |  | $ 141,748 | $ 143,190
Gross unrealized losses |  | 6,456 | 3,104
Available-for-sale securities, continuous unrealized losses, fair value |  | 124,000 | 124,800
Available-for-sale securities, continuous unrealized losses, 12 months or longer, fair value |  | 92,600 | 4,500
Available-for-sale securities, continuous unrealized accumulated losses, 12 months or longer |  | 5,500 | 900
Available-for-sale securities, continuous unrealized losses, 12 months or less, fair value |  | 31,400 | 120,300
Available-for-sale securities, continuous unrealized accumulated losses, 12 months or less |  | 1,000 | 2,200
Other-than-temporary impairment on available-for-sale security | $ 1,300 |  |
Trading securities |  | 32,400 | 38,900
Investments in sponsored mutual funds [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Trading securities |  | 11,000 | 8,100
Stocks of large U.S. and international companies [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Trading securities |  | 10,500 | 21,300
Corporate Debt Securities [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Trading securities |  | $ 9,000 | $ 7,500

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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 + Details
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