|
Schedule of Amount of Mortgage Loans (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% |
|
Prior To 2002
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
19,905 |
28,437 |
| Percentage of Total Carrying Amount |
|
4.00% |
5.00% |
|
2003
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
33,447 |
42,112 |
| Percentage of Total Carrying Amount |
|
6.00% |
7.00% |
|
2004
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
24,587 |
29,966 |
| Percentage of Total Carrying Amount |
|
4.00% |
5.00% |
|
2005
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
50,964 |
54,802 |
| Percentage of Total Carrying Amount |
|
9.00% |
9.00% |
|
2006
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
39,896 |
42,676 |
| Percentage of Total Carrying Amount |
|
7.00% |
7.00% |
|
2007
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
34,066 |
35,323 |
| Percentage of Total Carrying Amount |
|
6.00% |
6.00% |
|
2008
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
36,261 |
44,285 |
| Percentage of Total Carrying Amount |
|
6.00% |
7.00% |
|
2009
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
42,897 |
50,574 |
| Percentage of Total Carrying Amount |
|
8.00% |
8.00% |
|
2010
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
95,687 |
133,684 |
| Percentage of Total Carrying Amount |
|
17.00% |
22.00% |
|
2011
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
133,823 |
142,913 |
| Percentage of Total Carrying Amount |
|
24.00% |
24.00% |
|
2012
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
|
$ 51,681 |
|
| Percentage of Total Carrying Amount |
|
9.00% |
|