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Receivables (Tables) | 12 Months Ended
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Dec. 31, 2011
Receivables [Abstract] |
Schedule Of Trade Accounts Receivables Net |
|  | December 31, |
|  | 2011 |  |  | 2010 |
Accounts receivable—trade |  | $ | 239,033 |  |  | $ | 172,857 |
Allowance for doubtful accounts |  |  | (1,044 | ) |  |  | (1,307 | )
Accounts receivable—trade, net |  | $ | 237,989 |  |  | $ | 171,550 |
Schedule Of Allowance For Doubtful Accounts |
|  | December 31, |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Balance at beginning of period |  | $ | 1,307 |  |  | $ | 1,372 |  |  | $ | 1,132 |
Charged to costs and expenses |  |  | 373 |  |  |  | 491 |  |  |  | 558 |
Amounts written off |  |  | (636 | ) |  |  | (556 | ) |  |  | (320 | )
Recoveries |  |  | — |  |  |  | — |  |  |  | 2 |
Balance at end of period |  | $ | 1,044 |  |  | $ | 1,307 |  |  | $ | 1,372 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of credit losses for current financing receivables (such as trade and accounts receivable), including a rollforward of the balance. An alternative caption includes allowance for doubtful accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 310 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c) -Name Accounting Standards Codification -Paragraph 11B -Section 50 -URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524 + Details
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