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Commitments and Contingencies (Detail Textuals) (Guarantee of Indebtedness of Others [Member], USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
franchisee
Guarantee of Indebtedness of Others [Member]
 
Loss Contingencies [Line Items]  
Franchisees guaranteed under operating leases (in franchisees) 18pnra_FranchiseesGuaranteedUnderOperatingLeases
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_GuaranteeOfIndebtednessOfOthersMember
Potential amount of future rental payments $ 15.9us-gaap_GuaranteeObligationsMaximumExposure
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_GuaranteeOfIndebtednessOfOthersMember