Fair Value, Financial Assets and Liabilities Disclosed But Not Carried at Fair Value (Details) - USD ($)
$ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
May 31, 2011 |
| 5.875% Senior Notes [Member] |
|
|
|
| Debt instruments [Abstract] |
|
|
|
| Debt instrument, interest rate |
5.875%
|
5.875%
|
5.875%
|
| Carrying Value [Member] |
|
|
|
| Investments in debt securities [Abstract] |
|
|
|
| Total |
$ 0
|
$ 64,988
|
|
| Debt instruments [Abstract] |
|
|
|
| Total |
50,990
|
24,215
|
|
| Carrying Value [Member] | Subordinated Notes [Member] |
|
|
|
| Debt instruments [Abstract] |
|
|
|
| Notes payable |
50,990
|
0
|
|
| Carrying Value [Member] | 5.875% Senior Notes [Member] |
|
|
|
| Debt instruments [Abstract] |
|
|
|
| Notes payable |
0
|
24,215
|
|
| Carrying Value [Member] | U.S. Treasury Bills [Member] |
|
|
|
| Investments in debt securities [Abstract] |
|
|
|
| Debt securities held-to-maturity |
0
|
64,988
|
|
| Level 1 [Member] | Fair Value [Member] |
|
|
|
| Investments in debt securities [Abstract] |
|
|
|
| Total |
0
|
64,994
|
|
| Level 1 [Member] | Fair Value [Member] | U.S. Treasury Bills [Member] |
|
|
|
| Investments in debt securities [Abstract] |
|
|
|
| Debt securities held-to-maturity |
0
|
64,994
|
|
| Level 2 [Member] | Fair Value [Member] |
|
|
|
| Debt instruments [Abstract] |
|
|
|
| Total |
50,990
|
24,554
|
|
| Level 2 [Member] | Fair Value [Member] | Subordinated Notes [Member] |
|
|
|
| Debt instruments [Abstract] |
|
|
|
| Notes payable |
50,990
|
0
|
|
| Level 2 [Member] | Fair Value [Member] | 5.875% Senior Notes [Member] |
|
|
|
| Debt instruments [Abstract] |
|
|
|
| Notes payable |
$ 0
|
$ 24,554
|
|