|
Geographic Information (Composition of Company's Property and Equipment) (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Dec. 31, 2011
|
|
| Schedule Of Geographical Information [Line Items] | |||||
| Total Revenues | $ 64,273 | $ 58,759 | $ 186,839 | $ 169,805 | |
| Total | 30,427 | 30,427 | 28,272 | ||
|
UNITED STATES
|
|||||
| Schedule Of Geographical Information [Line Items] | |||||
| Total Revenues | 46,979 | 42,954 | 135,507 | 126,861 | |
| Total | 23,557 | 23,557 | 22,834 | ||
|
Europe [Member]
|
|||||
| Schedule Of Geographical Information [Line Items] | |||||
| Total Revenues | 10,361 | 9,727 | 31,273 | 25,169 | |
| Total | 5,728 | 5,728 | 4,526 | ||
|
CANADA
|
|||||
| Schedule Of Geographical Information [Line Items] | |||||
| Total Revenues | 2,922 | 2,607 | 8,429 | 7,221 | |
| Total | 311 | 311 | 344 | ||
|
Other [Member]
|
|||||
| Schedule Of Geographical Information [Line Items] | |||||
| Total Revenues | 4,011 | 3,471 | 11,630 | 10,554 | |
| Total | $ 831 | $ 831 | $ 568 | ||