|
Schedule of Mortgage Loans by Geographic Location and Property Type (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% |
|
Industrial
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
240,010 |
|
251,839 |
| Percentage of Total Carrying Amount |
43.00% |
|
42.00% |
|
Office
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
217,223 |
|
243,885 |
| Percentage of Total Carrying Amount |
39.00% |
|
40.00% |
|
Medical
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
41,405 |
|
43,089 |
| Percentage of Total Carrying Amount |
7.00% |
|
7.00% |
|
Other
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
64,576 |
|
65,959 |
| Percentage of Total Carrying Amount |
11.00% |
|
11.00% |
|
Pacific
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
127,975 |
|
138,529 |
| Percentage of Total Carrying Amount |
23.00% |
|
23.00% |
|
West north central
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
102,206 |
|
130,481 |
| Percentage of Total Carrying Amount |
18.00% |
|
22.00% |
|
West south central
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
106,981 |
|
98,036 |
| Percentage of Total Carrying Amount |
19.00% |
|
16.00% |
|
Mountain
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
81,540 |
|
82,029 |
| Percentage of Total Carrying Amount |
14.00% |
|
14.00% |
|
South Atlantic
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
59,017 |
|
63,125 |
| Percentage of Total Carrying Amount |
10.00% |
|
10.00% |
|
Middle Atlantic
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
37,429 |
|
42,112 |
| Percentage of Total Carrying Amount |
7.00% |
|
7.00% |
|
East north central
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
29,784 |
|
30,482 |
| Percentage of Total Carrying Amount |
5.00% |
|
5.00% |
|
East south central
|
|
|
|
| Mortgage Loans on Real Estate [Line Items] |
|
|
|
| Mortgages loans Carrying Amount |
$ 18,282 |
|
$ 19,978 |
| Percentage of Total Carrying Amount |
4.00% |
|
3.00% |