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Geographic Information (Long-Lived Assets By Geographic Areas) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | $ 529,176 | $ 448,810 | $ 377,433
United States [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | 495,609 | 426,329 | 361,083
Canada [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | 15,954 | 11,105 | 9,536
Other Foreign Countries [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | $ 17,613 | $ 11,376 | $ 6,814

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.10-17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Details
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