|
Schedule of Concentration of Mortgage Loans by State Greater Than Five Percent (Detail) (USD $)
In Thousands, unless otherwise specified
|
Sep. 30, 2012
|
Jun. 30, 2012
|
Dec. 31, 2011
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
$ 563,214 |
|
$ 604,772 |
| Percentage of Total Carrying Amount |
100.00% |
100.00% |
100.00% |
|
California
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
108,622 |
|
117,261 |
| Percentage of Total Carrying Amount |
19.00% |
|
19.00% |
|
Texas
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
94,762 |
|
84,724 |
| Percentage of Total Carrying Amount |
17.00% |
|
14.00% |
|
Minnesota
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
63,671 |
|
64,952 |
| Percentage of Total Carrying Amount |
11.00% |
|
11.00% |
|
Florida
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
32,889 |
|
31,310 |
| Percentage of Total Carrying Amount |
6.00% |
|
5.00% |
|
All others
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
$ 263,270 |
|
$ 306,525 |
| Percentage of Total Carrying Amount |
47.00% |
|
51.00% |