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Supplemental Disclosure of Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2013
Supplemental Disclosure of Cash Flow Information |
|  | Year ended |
|  | December |  |  | December |  |  | December |
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | (in thousands) |
Non-cash interest on acquisition consideration payable* |  | $ | 240 |  |  | $ | 940 |  |  | $ | 743 |
Cash paid for interest |  | $ | 548 |  |  | $ | 602 |  |  | $ | 388 |
Cash paid for income taxes |  | $ | 14,103 |  |  | $ | 18,475 |  |  | $ | 22,723 |
* recorded within interest expense

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration