v2.4.0.6

Valuation And Qualifying Accounts | 12 Months Ended
--- | ---
Dec. 31, 2011
Valuation And Qualifying Accounts [Abstract] |
Valuation And Qualifying Accounts | SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (dollars in thousands)
Accounts Receivable Allowance for Doubtful Accounts |  | Balance at Beginning of Year |  |  | Charged to Expense |  |  | Additions/ (Deductions) (1) |  |  | Balance at End of Year |
2011 |  | $ | 9,710 |  |  | $ | 1,321 |  |  | $ | (62 | ) |  | $ | 10,969 |
2010 |  |  | 9,167 |  |  |  | 917 |  |  |  | (374 | ) |  |  | 9,710 |
2009 |  |  | 14,438 |  |  |  | 1,970 |  |  |  | (7,241 | ) |  |  | 9,167 |
(1) | Primarily accounts receivable written off during the period.

X
- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
Name: | us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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