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Basis of Presentation and Description of Company (Details 2) (Immaterial error, Adjustment, USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Immaterial error | Adjustment
  
Increase purchases of property and equipment $ 4.1pcmi_IncreaseInPurchasesOfPropertyAndEquipment
/ us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis
= pcmi_ImmaterialErrorMember
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember
Increase borrowing under note payable 4.1pcmi_IncreaseInProceedsFromNotesPayable
/ us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis
= pcmi_ImmaterialErrorMember
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember
Decrease non-cash purchase of property and equipment $ 4.1pcmi_DecreaseNonCashPurchaseOfPropertyAndEquipment
/ us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis
= pcmi_ImmaterialErrorMember
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember