XML 53 R35.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Stock Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Long-term equity incentive plan, termination date | Oct. 19, 2014
Long-term equity incentive plan, amendment date | May 01, 2013
Long-term equity incentive plan, term | 10 years
Number of shares authorized under plan | 10,550,000
Share based awards | 8,313,735
Number of additional shares authorized for grant | 2,000,000
Restricted Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period of equity awards granted to employees, years | 4 years
Unrecognized compensation cost related to nonvested awards granted under the equity incentive plan | $ 22.9
Expected weighted-average period to recognize the cost of stock awards (in years) | 2 years 9 months 18 days
Performance Shares |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period of equity awards granted to employees, years | 4 years
Unrecognized compensation cost related to nonvested awards granted under the equity incentive plan | $ 3.2
Expected weighted-average period to recognize the cost of stock awards (in years) | 3 years 9 months 18 days
After Amendment |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Long-term equity incentive plan, termination date | May 01, 2023

X
- Definition The date when the equity incentive plan was amended, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year). + References No definition available. + Details
Name: | pkg_LongTermEquityIncentivePlanAmendmentDate
Namespace Prefix: | pkg_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of years the long term equity incentive plan termination date was extended. + References No definition available. + Details
Name: | pkg_LongTermEquityIncentivePlanExtendedTerm
Namespace Prefix: | pkg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The date when the equity incentive plan expires, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year). + References No definition available. + Details
Name: | pkg_LongTermEquityIncentivePlanTerminationDate
Namespace Prefix: | pkg_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Options, restricted stock and performance units granted since inception of the plan, net of forfeitures. + References No definition available. + Details
Name: | pkg_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedSinceInceptionOfPlanNetOfForfeitures
Namespace Prefix: | pkg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant