|
Intangible Assets, Net - Summary of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2013
|
Dec. 31, 2012
|
Jun. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|---|---|
| Definite-lived intangible assets: | ||||
| Investment contracts | $ 184,871 | $ 197,704 | ||
| Accumulated amortization | (170,681) | (181,409) | ||
| Definite-lived intangible assets, net | 14,190 | 16,295 | ||
| Indefinite-lived intangible assets | 32,416 | 32,416 | ||
| Total intangible assets, net | $ 46,606 | $ 48,711 | $ 50,187 | $ 52,096 |
| X | ||||||||||
|
- Definition
Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|