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Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Cash and Cash Equivalents [Line Items] |  |
Unrealized gains on the investments after-tax | $ 366 | $ 346
Money market funds |  |
Cash and Cash Equivalents [Line Items] |  |
Realized gains on the investments | 0 |
Unrealized gains on the investments | 0 |
Other mutual funds |  |
Cash and Cash Equivalents [Line Items] |  |
Unrealized gains on the investments | 600 | 600
Unrealized gains on the investments after-tax | 400 | 300
Fair Value, Measurements, Recurring |  |
Cash and Cash Equivalents [Line Items] |  |
Assets, Fair Value Disclosure | 2,113 | 2,310
Fair Value, Measurements, Recurring | Money market funds |  |
Cash and Cash Equivalents [Line Items] |  |
Assets, Fair Value Disclosure | 118 | 118
Fair Value, Measurements, Recurring | Other mutual funds |  |
Cash and Cash Equivalents [Line Items] |  |
Assets, Fair Value Disclosure | $ 1,995 | $ 2,192

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- Definition Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580 + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and 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 (b) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
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