|
Real Estate and Lending Activities Real Estate and Lending Activities - Components of Net Investment in Direct Financing Leases (Detail) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Business Combinations [Abstract] | ||
| Minimum lease payments receivable | $ 1,270,401 | $ 1,277,923 |
| Estimated residual values | 201,283 | 201,283 |
| Less: Unearned income | (1,156,045) | (1,164,794) |
| Net investment in direct financing leases | $ 315,639 | $ 314,412 |