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Segment and Related Information, Revenue By Major Customer (Details) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Revenue, Major Customer [Line Items] |  |
Percentage contributed in revenue by customers, minimum (in hundredths) | 10.00% |
Percentage of revenue generated by customer (in hundredths) | 100.00% | 100.00%
Hospitality segment [Member] | McDonald's Corporation [Member] |  |
Revenue, Major Customer [Line Items] |  |
Percentage of revenue generated by customer (in hundredths) | 19.00% | 20.00%
Hospitality segment [Member] | Yum! Brands, Inc. [Member] |  |
Revenue, Major Customer [Line Items] |  |
Percentage of revenue generated by customer (in hundredths) | 13.00% | 15.00%
Government segment [Member] | U.S. Department of Defense [Member] |  |
Revenue, Major Customer [Line Items] |  |
Percentage of revenue generated by customer (in hundredths) | 37.00% | 36.00%
All Others [Member] |  |
Revenue, Major Customer [Line Items] |  |
Percentage of revenue generated by customer (in hundredths) | 31.00% | 29.00%

X
- Definition Represents the minimum percentage contributed in revenue by customers. + References No definition available. + Details
Name: | par_MinimumPercentageContributedInRevenueByCustomers
Namespace Prefix: | par_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration