| **Other Income (Expense) (Tables)**      | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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| **Other Income and Expenses [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Schedule of other income (expense)       | Other income (expense) consists of the following:  Three Months Ended  June 30, Six Months Ended  June 30,  2016 2015 2016 2015Investment income, net        Net investment income from available-for-sale securities        Interest and dividend income $252 $2,130 $442 $4,389Accretion income 579 640 1,041 1,262Total net investment income from available-for-sale securities 831 2,770 1,483 5,651Interest income from investments in special purpose entities 2,050 2,003 4,101 4,005Interest accrued on notes receivable and other interest 78 665 105 995Total investment income, net 2,959 5,438 5,689 10,651Interest expense        Interest expense and amortization of discount and issuance costs for Senior Notes issued by special purpose entity (2,191) (2,189) (4,382) (4,377)Interest expense (954) (456) (1,798) (1,145)Total interest expense (3,145) (2,645) (6,180) (5,522)Claim settlement — — 12,548 —Other, net        Fees and expenses for the SEC investigation — (7,430) — (7,430)Accretion income from retained interest investments 243 227 484 438Hunting lease income 169 169 370 378Other income, net 189 21 196 178Other, net 601 (7,013) 1,050 (6,436)         Total other income (expense) $415 $(4,220)$13,107$(1,307) |

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| - Definition
Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items.
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