|
Schedule Carrying Amount of Mortgage Loans by Maturity (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 | $ 563,214 | $ 604,772 |
| Percentage of Total Carrying Amount | 100.00% | 100.00% | 100.00% |
|
Due in one year or less
|
|||
| Mortgage Loans on Real Estate [Line Items] | |||
| Mortgages loans Carrying Amount | 335 | 2,356 | |
|
Due after one year through five years
|
|||
| Mortgage Loans on Real Estate [Line Items] | |||
| Mortgages loans Carrying Amount | 174,437 | 153,822 | |
| Percentage of Total Carrying Amount | 31.00% | 25.00% | |
|
Due after five years through ten years
|
|||
| Mortgage Loans on Real Estate [Line Items] | |||
| Mortgages loans Carrying Amount | 226,483 | 255,615 | |
| Percentage of Total Carrying Amount | 40.00% | 42.00% | |
|
Due after ten years
|
|||
| Mortgage Loans on Real Estate [Line Items] | |||
| Mortgages loans Carrying Amount | $ 161,959 | $ 192,979 | |
| Percentage of Total Carrying Amount | 29.00% | 33.00% |