|
Fair Value Measurements Unobservable Inputs Reconciliation - Assets (Details) (Fair Value, Measurements, Recurring [Member], Level 3, USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance at beginning of period |
$ 56,276 |
$ 70,221 |
| Purchases |
10,923 |
6,138 |
| Sales |
(38,792) |
(4,156) |
| Unrealized gains |
5,373 |
636 |
| Unrealized losses |
(11,996) |
(16,563) |
| Balance at end of period |
21,784 |
56,276 |
|
Investments in Associated Companies [Member]
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance at beginning of period |
0 |
0 |
| Purchases |
10,923 |
0 |
| Sales |
0 |
0 |
| Unrealized gains |
0 |
0 |
| Unrealized losses |
(402) |
0 |
| Balance at end of period |
10,521 |
0 |
|
Other Investments - Related Party [Member]
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance at beginning of period |
42,653 |
62,553 |
| Purchases |
0 |
0 |
| Sales |
(23,061) |
(4,156) |
| Unrealized gains |
3,265 |
636 |
| Unrealized losses |
(11,594) |
(16,380) |
| Balance at end of period |
11,263 |
42,653 |
|
Other Investments [Member]
|
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
|
|
| Balance at beginning of period |
13,623 |
7,668 |
| Purchases |
0 |
6,138 |
| Sales |
(15,731) |
0 |
| Unrealized gains |
2,108 |
0 |
| Unrealized losses |
0 |
(183) |
| Balance at end of period |
$ 0 |
$ 13,623 |