|
Investments - Schedule of Amount of Mortgage Loans (Details) (USD $)
In Thousands, unless otherwise specified
|
Mar. 31, 2013
|
Dec. 31, 2012
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
$ 678,506 |
$ 677,380 |
| Percentage of total carrying amount |
100.00% |
100.00% |
|
Prior to 2004
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
45,232 |
48,973 |
| Percentage of total carrying amount |
7.00% |
7.00% |
|
2004
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
18,985 |
19,699 |
| Percentage of total carrying amount |
3.00% |
3.00% |
|
2005
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
32,056 |
32,666 |
| Percentage of total carrying amount |
5.00% |
5.00% |
|
2006
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
36,329 |
39,321 |
| Percentage of total carrying amount |
5.00% |
6.00% |
|
2007
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
31,275 |
31,484 |
| Percentage of total carrying amount |
5.00% |
5.00% |
|
2008
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
35,305 |
35,747 |
| Percentage of total carrying amount |
5.00% |
5.00% |
|
2009
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
41,083 |
41,691 |
| Percentage of total carrying amount |
6.00% |
6.00% |
|
2010
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
87,993 |
90,236 |
| Percentage of total carrying amount |
13.00% |
13.00% |
|
2011
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
128,794 |
130,590 |
| Percentage of total carrying amount |
19.00% |
19.00% |
|
2012
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
203,333 |
206,973 |
| Percentage of total carrying amount |
30.00% |
31.00% |
|
2013
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
$ 18,121 |
$ 0 |
| Percentage of total carrying amount |
2.00% |
0.00% |