XML 52 R24.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Accounts Receivable (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Accounts Receivable |
Schedule of allowance for bad debt | The following table sets forth activities in our allowance for bad debt (in thousands):
|  | 2012 |  | 2011 |  | 2010 |
--- | --- | --- | --- | --- | --- | --- | ---
Balance as of beginning of period |  | $ | 24,301 |  | $ | 20,201 |  | $ | 19,690 |
Charges to provision for bad debt |  |  | 4,790 |  |  | 8,173 |  |  | 4,262 |
Write-off of uncollectible accounts receivable |  |  | (6,025) |  |  | (4,681) |  |  | (4,291) |
Recoveries of bad debt |  |  | 653 |  |  | 608 |  |  | 540 |
Balance as of end of period |  | $ | 23,719 |  | $ | 24,301 |  | $ | 20,201 |

X
- Definition Tabular disclosure of the activity in the allowance for doubtful accounts. + References No definition available. + Details
Name: | int_ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock
Namespace Prefix: | int_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AccountsReceivableNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration