|
Investments - Schedule of Amount of Mortgage Loans (Details) (USD $)
In Thousands, unless otherwise specified
|
Mar. 31, 2015
|
Dec. 31, 2014
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
$ 546,863 |
$ 543,094 |
| Percentage of total carrying amount |
100.00% |
100.00% |
| Prior to 2006 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
43,177 |
47,843 |
| Percentage of total carrying amount |
9.00% |
9.00% |
| 2006 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
15,818 |
16,280 |
| Percentage of total carrying amount |
3.00% |
3.00% |
| 2007 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
18,592 |
19,991 |
| Percentage of total carrying amount |
3.00% |
4.00% |
| 2008 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
22,570 |
22,938 |
| Percentage of total carrying amount |
4.00% |
4.00% |
| 2009 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
17,584 |
20,754 |
| Percentage of total carrying amount |
3.00% |
4.00% |
| 2010 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
48,872 |
51,205 |
| Percentage of total carrying amount |
9.00% |
9.00% |
| 2011 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
88,784 |
91,943 |
| Percentage of total carrying amount |
16.00% |
17.00% |
| 2012 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
126,783 |
133,912 |
| Percentage of total carrying amount |
23.00% |
25.00% |
| 2013 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
76,840 |
77,784 |
| Percentage of total carrying amount |
14.00% |
14.00% |
| 2014 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
59,863 |
60,444 |
| Percentage of total carrying amount |
11.00% |
11.00% |
| 2015 |
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
| Mortgage loans, carrying value |
$ 27,980 |
$ 0 |
| Percentage of total carrying amount |
5.00% |
0.00% |