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Geographic Information (Long-Lived Assets By Geographic Areas) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | $ 667,323 | $ 529,176 | $ 448,810
United States [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | 632,783 | 495,609 | 426,329
Canada [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | 22,572 | 15,954 | 11,105
Other Foreign Countries [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Long-Lived Assets | $ 11,968 | $ 17,613 | $ 11,376

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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -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 210.5-02.10-17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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