|
Investments (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Certificates of deposit and money market funds due within one year | $ 5,601 | $ 5,938 |
| Investments in mutual funds | 19,421 | 15,185 |
| Total investment | 25,022 | 21,123 |
| Short-term investments | 6,801 | 7,138 |
| Long-term investments | 18,221 | 13,985 |
| Total investment | 25,022 | 21,123 |
|
Held to maturity
|
||
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Certificates of deposit and money market funds due within one year | 5,601 | 5,938 |
| Total investment | 5,601 | 5,938 |
| Short-term investments | 5,601 | 5,938 |
| Total investment | 5,601 | 5,938 |
|
Available for sale
|
||
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Investments in mutual funds | 19,421 | 15,185 |
| Total investment | 19,421 | 15,185 |
| Short-term investments | 1,200 | 1,200 |
| Long-term investments | 18,221 | 13,985 |
| Total investment | $ 19,421 | $ 15,185 |