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Fair Value Measurements (Details 1) - Level 3 - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2016
Convertible preferred securities (a) |  |  |  |  |  |  |
Reconciliation of Fair Value Measurements Using Level 3 |  |  |  |  |  |  |
Asset (liability), Beginning Balance | $ 3,294 | $ 3,294 | $ 3,294 | $ 3,294 | $ 775 | $ 13,550 |
Gains (losses) included in earnings |  | 0 | 0 |  | 19 | 710 |
Unrealized gains (losses) included in other comprehensive income | 344 |  |  | 0 |  |  |
Sales proceeds |  |  | 0 |  |  | (13,485) |
New investments | 3,000 | 0 |  | 0 | 2,500 |  |
Asset (liability), Ending Balance | 6,638 | 3,294 | 3,294 | 3,294 | 3,294 | 775 |
Convertible preferred securities (a) | Implied based on market prices |  |  |  |  |  |  |
Quantitative Information about Level 3 Fair Value Measurements |  |  |  |  |  |  |
Convertible preferred securities (a) | 6,638 |  |  | 3,294 |  |  | $ 3,294
Real Property | Third-Party Appraisal |  |  |  |  |  |  |
Quantitative Information about Level 3 Fair Value Measurements |  |  |  |  |  |  |
Real Property |  |  |  |  |  |  | $ 11,210
Contingent Consideration |  |  |  |  |  |  |
Reconciliation of Fair Value Measurements Using Level 3 |  |  |  |  |  |  |
Asset (liability), Beginning Balance | 0 | 0 | 0 | 0 | (160) | (350) |
Gains (losses) included in earnings |  | 0 | 0 |  | 160 | 190 |
Unrealized gains (losses) included in other comprehensive income | 0 |  |  | 0 |  |  |
Sales proceeds |  |  | 0 |  |  | 0 |
New investments | 0 | 0 |  | 0 | 0 |  |
Asset (liability), Ending Balance | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ (160) |

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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, New Agreements + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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 (c)(1a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount of sales of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 + Details
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