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Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Significant Accounting Policies [Abstract] |
Cash and cash equivalents orginal maturity | three months or less

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- Definition Cash and cash equivalents original maturity. + References No definition available. + Details
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- Definition Disclosure of significant accounting policies. + References No definition available. + Details
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Namespace Prefix: | pds_
Data Type: | xbrli:stringItemType
Balance Type: | na
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