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Income Taxes Income Taxes - Additional Information (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Income Taxes [Line Items] |  |
Current deferred tax assets | $ 23,700,000 | $ 34,000,000
Long term deferred tax assets | 19,600,000 | 10,100,000
Long term deferred tax liabilities | 252,200,000 | 193,000,000
Valuation allowance, amount | 11,704,000 | 12,361,000
Valuation allowance, deferred tax asset, change in amount |  | 700,000
Net operating loss carryforwards, expiration year | 2021 |
Unrecognized tax benefits, income tax penalties and interest accrued | 2,800,000 | 4,800,000
Unrecognized tax benefits, net of associated tax assets and excluding federal tax benefit of state taxes, interest and penalties | 26,700,000 | 49,500,000
Asset associated with uncertain tax position | 15,900,000 | 16,000,000
Unrecognized tax benefits would impact effective tax rate | 11,600,000 | 32,800,000
Income Tax Expense (Benefit) | 20,500,000 |
Undistributed earnings from foreign earnings | 67,400,000 |
Deferred tax liability related to undistributed earnings from foreign earnings If the earnings of foreign subsidiaries were not indefinitely reinvested | 23,600,000 |
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities | 28,346,000 | 0
Internal Revenue Service (IRS) [Member] | Silgan Holdings [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards |  | 9,500,000
Internal Revenue Service (IRS) [Member] | Portola Packaging, Inc [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards |  | 300,000
State and Local Jurisdiction |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards |  | 4,600,000
State and Local Jurisdiction | Minimum [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards, expiration year |  | 2015
State and Local Jurisdiction | Maximum [Member] |  |
Income Taxes [Line Items] |  |
Net operating loss carryforwards, expiration year |  | 2024
Deferred Tax Asset, Operating Loss Carryforwards, Domestic |  |
Income Taxes [Line Items] |  |
Valuation allowance, amount | $ 11,700,000 |

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